Antagonists
- The Demon King of Confusion (混世魔王) is a yaoguai who led his minions to seize control of the Water Curtain Cave (水簾洞) and drive away the primates shortly after Sun Wukong left to study under Master Bodhi. Many years later, Sun Wukong returns, defeats the yaoguai and takes back control of the cave.
- General Yin (寅將軍), Xiong Shanjun (熊山君), and Techushi (特處士) are three yaoguai whose true forms are a dark yellow tiger, a black bear, and a yellow buffalo respectively. They ambush Tang Sanzang and his two escorts at Double-Forked Ridge (雙叉嶺) and capture them. The escorts are killed and eaten by the yaoguai while Tang Sanzang is rescued by Taibai Jinxing.
- Elder Jinchi (金池長老) is the greedy abbot of the Guanyin Monastery (觀音禪院), who intends to kill Tang Sanzang and Sun Wukong to take Sanzang's cassock for himself, having been so impressed by it. He is also later revealed to be a long-time friend of the Black Wind Demon, who taught him magic that allowed him to achieve longevity, thus he has lived for 270 years.
- Guangzhi (廣智) and Guangmou (廣謀) are Elder Jinchi's disciples. Guangmou is the one who gives Jinchi the idea to murder Tang Sanzang and steal his cassock.
- The Black Wind Demon (黑風怪) is a black bear yaoguai based in the Black Wind Cave (黑風洞) on Black Wind Mountain (黑風山). Appearing as a dark-complexioned man armed with a spear with a black tassel, he steals Tang Sanzang's cassock during the fire at a nearby monastery. The fire is set by the monastery's abbot, Elder Jinchi in an attempt to murder Tang Sanzang so that he can take the cassock for himself. Sun Wukong confronts the yaoguai later to retrieve his master's cassock, but the yaoguai manages to evade him every time. The yaoguai ultimately surrenders to Guanyin and serves as the mountain's guardian deity.
- Baiyi Xiushi (白衣秀士; 'Scholar in a White Robe') and Lingxuzi (凌虛子), whose true forms are a white floral-patterned serpent and a grey wolf respectively, are the Black Wind Demon's yaoguai friends. They are both killed by Sun Wukong.
- The Yellow Wind Demon (黃風怪), is a yaoguai based in Yellow Wind Cave (黃風洞) at Yellow Wind Ridge (黃風嶺). After Tang Sanzang is captured by the yaoguai, Sun Wukong attempts to save his master but is held back by the yaoguai, who can blow great blasts of the "True Wind of Samadhi" (三昧真風; Sānmèi Zhēnfēng). Sun Wukong then seeks help from Lingji Bodhisattva, who subdues the yaoguai and reveals that the yaoguai is actually a yellow marten spirit from Vulture Peak.
- The Tiger Vanguard (虎先鋒) is a minion of the Yellow Wind Demon who captures Tang Sanzang while Sun Wukong and Zhu Bajie are distracted. He is killed by Zhu Bajie.
- Immortal Zhenyuan (鎮元大仙), the patriarch of all earthbound immortals, is based in Wuzhuang Temple (五莊觀) on Longevity Mountain (萬壽山) in West Continent (西牛賀洲). In his temple, there is a special ginseng tree that produces only 30 fruits every 10,000 years. The fruit is shaped like an infant less than three days old; anyone who smells the fruit can extend their lifespan by 365 years, and anyone who consumes the fruit can live for another 48,000 years. Zhenyuan was away when the protagonists arrive at his temple on their journey. Earlier on, he had instructed his servants to serve two fruits to Tang Sanzang. When Tang Sanzang sees the fruit, he is disgusted by its appearance and refuses to eat it. The servants then secretly eat the fruits, but are seen by Zhu Bajie, who tells Sun Wukong about it. Sun Wukong then steals more fruits for himself and his juniors. When the servants realise some fruits are missing, they accuse Sun Wukong of theft and Sun Wukong destroys the tree in anger before escaping with his companions. When Zhenyuan returns to his temple, he turns furious after hearing about what happened and confronts the protagonists. The conflict is eventually resolved when Sun Wukong gets the Star of Longevity to restore the tree to life. Zhenyuan is so pleased that he becomes sworn brothers with Sun Wukong and treats all of them to a fruit feast before sending them off on their journey.
- The White Bone Demoness (白骨精), sometimes translated as Lady White Bone, is a shapeshifting skeleton yaoguai. She disguises herself as a young woman, pretending to offer poisoned fruits to Tang Sanzang. Sun Wukong sees through her ruse and apparently kills the young woman, but the yaoguai escapes and returns later in disguise as the young woman's mother. Sun Wukong sees through her disguise again and apparently kills the older woman. The yaoguai flees yet again and returns in disguise as a man claiming to be the older woman's husband and younger woman's father. Sun Wukong sees through the yaoguai's third disguise and finally destroys her. However, Tang Sanzang has been misled into believing that Sun Wukong has just murdered three innocent people, so he banishes Sun Wukong after the third time.
- The Yellow Robe Demon (黃袍怪) is a yaoguai based in Moon Waves Cave (波月洞) on Bowl Mountain (碗子山) in the Kingdom of Baoxiang (寶象國). When Tang Sanzang is captured by the yaoguai, Zhu Bajie and Sha Wujing attempt to save their master but are no match for the yaoguai, so Zhu Bajie reluctantly goes to bring back Sun Wukong, who was previously banished by their master for killing the White Bone Demoness. With the help of celestial forces, Sun Wukong uncovers the yaoguai's true identity: the Wood Wolf of Legs, one of the 28 Mansions. The Kuimulang had fallen in love with a Jade Maiden and wanted to elope with her, but they were caught and punished as romantic feelings were forbidden among celestials. After she is reincarnated as Baihuaxiu (百花羞), the third princess of the Kingdom of Baoxiang, the Kuimulang kidnaps her, marries her for 13 years and has two children with her. The Jade Emperor orders the remaining 27 Mansions to assist Sun Wukong in subduing their wayward fellow member and take him back to Heaven.
- The Golden Horned King (金角大王, Jīnjiǎo dàwáng) and Silver Horned King (銀角大王, Yínjiǎo dàwáng) are a pair of yaoguai brothers based in Lotus Cave (蓮花洞) on Flat Peak Mountain (平頂山). They use disguises to capture Tang Sanzang, and manage to pin down Sun Wukong under three mountains. With help from the local deities, Sun Wukong frees himself and uses trickery to save his master and rob the yaoguai of their five magic weapons, trapping them in their own magic gourd. Just then, Taishang Laojun appears and explains that the two yaoguai are actually his servants who had stolen their master's weapons and escaped to cause trouble. Then, he takes back his weapons and brings his servants back with him to Heaven.
- The Dragon Suppressing Great Immortal (壓龍大仙), based in Dragon Suppressing Cave (壓龍洞), is a nine-tailed vixen. Taking the form of an elderly woman, she is actually the mother of the Golden and Silver Horned Kings. She is killed by Sun Wukong when her sons send their minions to fetch her to their mountain.
- Hu'aqi (狐阿七), whose true form is a fox, is the nine-tailed vixen's brother. He is killed by Zhu Bajie.
- The Lion-Lynx Demon (獅猁怪) is a yaoguai who drowns the king of the Kingdom of Wuji (烏雞國) in a well, and impersonates the king for three years. After the ghost of the dead king appears to Tang Sanzang in a dream and begs him for help, Tang Sanzang sends his disciples to retrieve the king's body and use a Pill of Immortality to restore him to life. When they confront the yaoguai and expose him as an imposter, the yaoguai transforms into Tang Sanzang to confuse Sun Wukong. However, his cover is blown when he fails to recite the Ring-Tightening Mantra that gives Sun Wukong a headache. Just as Sun Wukong is about to destroy the yaoguai, Manjusri shows up and reveals that the yaoguai is actually the Azure Lion (青毛狮子) he rides on, and that he was acting on the Buddha's instruction to allow his steed to serve as an obstacle to the protagonists to test their resolve to complete their quest. Once he is done, Manjusri takes back the Azure Lion.
- Red Boy (紅孩兒), also known as Divine Infant Great King (圣婴大王), is a yaoguai who is Bull Demon King and Princess Iron Fan's son. A formidable opponent to Sun Wukong, he is capable of breathing samadhi fire, which drives back Sun Wukong. After Sun Wukong seeks help from Guanyin, Red Boy later finds Guanyin's lotus throne by chance and disrespectfully sits on it, but ends up being trapped and subdued. Red Boy eventually agrees to give up his evil ways and serve as an attendant to the bodhisattva.
- The Water Lizard Dragon (鼉龍), is a yaoguai armed with a Bamboo-Linked Bronze Club and based in Black River (黑水河) in Hengyang Valley (衡陽峪). He disguises himself as a boatman, pretends to ferry the protagonists across the river, and captures Tang Sanzang when they are unaware. Sun Wukong later learns that the yaoguai is actually the ninth son of the Dragon King of the Jing River, and had been placed there by Guanyin to serve as an obstacle to the protagonists. The Water Lizard Dragon is eventually subdued and taken away by his cousin, Crown Prince Mo'ang.
- The Immortal of Tiger Power (虎力大仙), Immortal of Elk Power (鹿力大仙), and Immortal of Antelope Power (羊力大仙) are three yaoguai who disguise themselves as magicians to deceive the ruler of the Kingdom of Chechi (車遲國) and become the king's advisers. As their names suggest, their true forms are a tiger, an elk, and an antelope respectively. Sun Wukong competes with them in a contest of magic powers and lures them into meeting their respective ends: Tiger is beheaded; Elk is disemboweled; Antelope is fried in boiling oil.
- The Great King of Numinous Power (靈感大王), armed with a bronze hammer, is a yaoguai based in Heaven-Reaching River (通天河). He terrorises the people living near the river and demands that they sacrifice a boy and a girl to him every year, or else he will cause flooding. After Sun Wukong defeats him, he retreats to his underwater lair. Later, Sun Wukong learns from Guanyin that the yaoguai is actually a goldfish from a lotus pond at Mount Putuo who had obtained his powers after listening to the bodhisattva recite Buddhist scriptures every day. Guanyin uses a fish basket to trap the goldfish and take him back to the pond.
- The Great White Turtle (大白龜) is a giant turtle based in Heaven-Reaching River (通天河) who was forced out of his underwater residence by the Great King of Numinous Power. After the yaoguai was subdued and taken away, the turtle feels so grateful to the protagonists that he ferries them across the river on his back. Before continuing on his journey, Tang Sanzang promises to help the turtle ask the Buddha when the turtle will be able to assume human form. However, Tang Sanzang forgets his promise when he and his disciples reach their final destination at Vulture Peak and meet the Buddha. On their way back to Chang'an, the protagonists are abruptly dropped off at Heaven-Reaching River, where they meet the turtle again. While ferrying them across the river on his back again, the turtle asks Tang Sanzang about his promise, and Tang Sanzang apologises for forgetting. The unhappy turtle throws them off his back into the water, forcing them to swim across the river. This incident fulfils the last of the 81 tribulations that Tang Sanzang is destined to face on his journey to obtain the scriptures.
- The Single Horned Rhinoceros King (獨角兕大王), armed with a bronze spear, is a yaoguai based in Golden Pouch Cave (金兜洞) on Golden Pouch Mountain (金兜山) who captures Tang Sanzang, Zhu Bajie and Sha Wujing. While fighting the yaoguai, Sun Wukong loses his Ruyi Jingu Bang after the yaoguai uses a giant magic ring to suck it away from him. Sun Wukong then seeks help from various celestial forces, including Li Jing, Nezha, the fire deities, and the Eighteen Arhats, but all of them also lose their weapons. The yaoguai is eventually revealed to be Taishang Laojun's steed, the Azure Bull, who had stolen his master's magic ring and used it to cause trouble. Taishang Laojun shows up to subdue the Azure Bull and take back his magic ring.
- The Ruler of Women's Country (女兒國國王) is the ruler of a country in Western Xiliang with an all-female population — reminiscent of Amazons. When the protagonists arrive in her country, she falls in love with Tang Sanzang and wants to marry him. On Sun Wukong's suggestion, Tang Sanzang pretends to marry the ruler and lies that his three disciples will go to fetch the scriptures in his place. Just as the protagonists are about to leave the country and continue on their quest, the Scorpion Demoness shows up and captures Tang Sanzang.
- Immortal Ruyi (如意真仙) is a yaoguai who is Bull Demon King's brother. He is based in Immortal Gathering Temple (聚仙庵) on Mount Jieyang (解陽山) in Women's Country. While they are in Women's Country, Tang Sanzang and Zhu Bajie unsuspectingly drink from the Spring of Pregnancy and become pregnant. The only cure is to drink from the Spring of Abortion, which is under Ruyi's control. When the women in Women's Country want to drink from the spring, they need to present gifts to Ruyi first. Ruyi holds a grudge against Sun Wukong because of the fate of his nephew, Red Boy, and he behaves in a hostile manner when Sun Wukong comes to seek water from the spring. Ruyi is eventually outwitted and defeated by Sun Wukong.
- The Scorpion Demoness (蠍子精), whose true form is a pipa-sized giant scorpion, is a yaoguai based in Pipa Cave (琵琶洞) on Venom Mountain (毒敵山). Shortly after leaving Women's Country, Tang Sanzang is abducted by the yaoguai and taken to her lair, where she tries to seduce him to marry her. Sun Wukong and Zhu Bajie fight the yaoguai to save their master but are held back by her venomous sting. Eventually, they seek help from the Sun Rooster of Hairy Head, one of the 28 Mansions, who transforms into a giant rooster and kills the scorpion.
- The Six-Eared Macaque (六耳獼猴) is a spiritual primate on par with Sun Wukong in terms of their powers and abilities. Hoping to prove that he is better than Sun Wukong, the Macaque first appears in Western Liang in disguise as Sun Wukong, knocks Tang Sanzang unconscious, and steals the baggage and paperwork. Later, when he fights with Sun Wukong, neither of them is able to overcome his opponent. No one is able to identify who the real Sun Wukong is until they show up before the Buddha, who tells them about the spiritual primates. The Macaque attempts to flee when he realises his identity is revealed, but the Buddha traps him under a giant alms bowl, and he is then killed by Sun Wukong.
- The Bull Demon King (牛魔王), whose true form is a giant white bull, is a yaoguai based in Sky-Scraping Cave (摩雲洞) on Thunder-Accumulating Mountain (積雷山). Early in the novel, he becomes sworn brothers with Sun Wukong and five other yaoguai and is ranked the most senior of the seven. Later on, when the protagonists arrive at the Flaming Mountains on their journey, they get into conflict with Bull Demon King and Princess Iron Fan, especially since Sun Wukong had caused the downfall of their son, Red Boy. Bull Demon King is ultimately subdued by celestial forces and taken to Heaven for the Jade Emperor to decide his fate.
- The Water Repelling Golden Crystal Beast (避水金晶獸) is Bull Demon King's steed.
- The Jade-Faced Princess (玉面公主), whose true form is a vixen, is Bull Demon King's concubine. She is killed by Zhu Bajie.
- Princess Iron Fan (鐵扇公主) is a rakshasa who is Bull Demon King's estranged wife and Red Boy's mother. Her secret weapon is a banana leaf fan, which can create strong winds. When Sun Wukong tries to borrow her fan to put out the fires at the Flaming Mountains, she is extremely hostile towards him because of his role in her son's downfall. Sun Wukong then uses trickery to steal the fan from her.
- The Wansheng Dragon King (萬聖龍王) is a yaoguai based in Emerald Waves Lake (碧波潭) at Rocky Mountain (亂石山) in the Kingdom of Jisai (祭賽國). He plots with his son-in-law, the Nine-Headed Beast, to steal a śarīra from the pagoda in Golden Ray Monastery (金光寺) and release a rain of blood in the kingdom. Without the śarīra, the pagoda loses its magical glow. The king blames the calamity on the monks, accusing them of stealing the śarīra and persecuting them. When Sun Wukong and his companions arrive in Jisai, they uncover the truth and confront and kill the dragon king and his family. The lost śarīra is found and returned to the pagoda.
- The Wansheng Princess (萬聖公主) is Wansheng Dragon King's daughter and the Nine-Headed Beast's wife who had stolen the Nine Leaves Lingzhi Herb from the Queen Mother of the West. She is slain by Zhu Bajie.
- The Nine-Headed Beast (九頭蟲), also known as the Nine-Headed Prince Consort (九頭駙馬), is Wansheng Dragon King's son-in-law who is armed with a monk's spade. He collaborates with his father-in-law to steal the śarīra from the pagoda. Sun Wukong enlists the help of celestial forces to deal with the demons. The Nine-Headed Beast has one of his heads bitten off by Erlang Shen's hound but manages to escape.
- Benbo'erba (奔波兒灞) and Babo'erben (灞波兒奔) are two minions of the Nine-Headed Beast whose respective forms are a sheatfish and a blackfish. Sun Wukong encounters them at the pagoda and captures and interrogates them, finding out the truth behind the theft of the śarīra.
- A group of tree yaoguai are based in Wood Immortal Temple (木仙庵) at Bramble Ridge (荊棘嶺). The four most senior are Jinjie Shiba Gong (勁節十八公), Guzhi Gong (孤直公), Lingkongzi (凌空子) and Fuyun Sou (拂雲叟), who appear in human form as four old men. Their true forms are a pine tree, a cedar tree, a juniper tree, and a bamboo tree respectively. Tang Sanzang encounters them in the temple and discusses poetry with them. Other yaoguai include the Naked Demon (赤身鬼) and the Apricot Immortal (杏仙), whose true forms are a maple tree and an apricot tree respectively, while their servants are flowers. Sun Wukong sees through their disguise and tells Zhu Bajie when the latter asks him if he detects any yaoguai in the vicinity. Zhu Bajie then destroys all the yaoguai on his own initiative. Tang Sanzang reprimands Zhu Bajie for killing the yaoguai because they never harmed him, but Sun Wukong explains that it is better to destroy them in case they turn evil in the future.
- The Yellow Brows Great King (黃眉大王) is a yaoguai who creates a replica of the Leiyin Temple at Vulture Peak and impersonates the Buddha while his followers disguise themselves as the Buddha's followers. Tang Sanzang, Zhu Bajie and Sha Wujing fall for the ruse, mistakenly believing that they have reached Leiyin Temple, and end up being captured by the yaoguai. Sun Wukong, unable to overcome the yaoguai, seeks help from various celestial forces but they all get trapped by the yaoguai in a magic sack. Just then, Maitreya shows up and reveals that the yaoguai is actually his attendant who had escaped to cause trouble. At Maitreya's suggestion, Sun Wukong transforms into a watermelon, allowing the unsuspecting yaoguai to eat him and enter his stomach. Sun Wukong causes great agony to the yaoguai in his stomach, forcing him to surrender and return to Maitreya.
- The Python Demon (蟒蛇精) is a yaoguai based in Tuoluo Manor (駝羅庄) on Qijue Mountain (七絕山). Armed with a pair of spears, which are actually the tips of his forked tongue, his true form is a giant python with red scales and glowing eyes. He has eaten many people and animals living in the surroundings. He is killed when Sun Wukong enters his body in disguise as a fly and breaks out of his stomach.
- Sai Tai Sui (賽太歲; 'Equivalent to Tai Sui') is a yaoguai based on Qilin Mountain (麒麟山) in the Kingdom of Zhuzi (朱紫國). Armed with a broad axe, he also has a set of Purple-Gold Bells, which can conjure fire, smoke and dust storms. He kidnaps one of the king's concubines and tries to force her to marry him. Unknown to him, the Immortal Ziyang (紫陽真人) has secretly cast a protective charm on the lady such that anyone who touches her will feel like being pricked by thorns. Sun Wukong uses tricks to steal the bells from Sai Tai Sui and then uses them against the yaoguai. Eventually, the yaoguai is revealed to be the Golden-Haired Hou (金毛犼), a large canine beast which Guanyin rides on. The bodhisattva shows up to subdue the Hou and take him back.
- The Spider Demonesses (蜘蛛精) are seven spider yaoguai sisters based in Silk Cave (盤絲洞) at Silk Ridge (盤絲嶺). Tang Sanzang stumbles upon their thatched hut while begging for alms and tries to leave after suspecting that they are yaoguai. However, it is too late as the yaoguai emit spider silk from their navels and spin a web to trap Tang Sanzang. They are defeated by Sun Wukong later and have no choice but to release Tang Sanzang. They are ultimately killed by Sun Wukong.
- The Hundred-Eyed Demon Lord (百眼魔君), also known as the Multiple-Eyed Creature (多目怪), is a giant centipede yaoguai based in Yellow Flower Temple (黃花觀) who has a thousand eyes radiating brilliant golden light to confuse enemies and victims. He is a friend of the seven spider sisters, who approach him for help in taking revenge after Sun Wukong defeats them. When the protagonists stop at his temple for a break, he pretends to offer them drinks, which have been poisoned. After Sun Wukong sees through his ruse, he holds Tang Sanzang hostage while Sun Wukong then captures the seven spiders. When he refuses to exchange Tang Sanzang for the spiders, Sun Wukong kills the spiders in anger. The centipede is eventually subdued by Pilanpo Bodhisattva and sent to guard the Thousand Flowers Cave (千花洞) at Purple Clouds Mountain (紫雲山).
- The three yaoguai based in Lion Camel Cave (獅駝洞) at Lion Camel Ridge (獅駝嶺):
- The Azure Lion (青毛獅子) is armed with a bronze sword and capable of transforming himself into several times bigger or smaller than his usual size. While he is fighting Sun Wukong, he swallows the latter, who causes him great pain inside his stomach. The Lion then pretends to agree to open his mouth to let Sun Wukong out, while secretly planning to bite him to death when he comes out. Having seen through the Lion's ruse, Sun Wukong sticks out his Ruyi Jingu Bang instead and the Lion breaks his teeth after biting on the staff. Sun Wukong then ties a long rope around the yaoguai's heart and plays with it before leaving his stomach. The bodhisattva Manjusri shows up again and reveals that the yaoguai is actually the Azure Lion he rides on, and he helps the protagonist subdue the Lion and takes it back.
- The Golden Winged Great Peng (金翅大鵬雕), armed with a ji and capable of flying over great distances, possesses a magic flask which can trap victims and reduce them to a bloody pulp. He uses the flask to trap Sun Wukong but the latter breaks out and renders the flask useless since its contents have been spilled in the process. The Peng is later revealed to be the brother of the peacock Mahamayuri, the Buddha's godmother. The Buddha shows up to subdue the yaoguai and takes him back to Vulture Peak.
- The Yellow Toothed Elephant (黃牙老象), armed with a long spear, appears as a gigantic humanoid with an elephant's head and a long nose capable of trapping and crushing victims. While he is fighting with Zhu Bajie, he uses his nose to wrap around the latter and capture him. The Elephant is eventually revealed to be the Six-tusked White Elephant that the bodhisattva Samantabhadra rides on. Samantabhadra shows up to subdue the Elephant and takes him back.
- The White Deer Spirit (白鹿精) and his adoptive daughter, the White-Faced Vixen Spirit (白面狐狸精), are a white deer and a vixen respectively. Disguising himself as a middle-aged man, the Deer transforms the Vixen into a beautiful young maiden and gets the ruler of the Kingdom of Biqiu (比丘國) to marry her while he becomes the king's father-in-law. Under the two yaoguai's influence, the king's health gradually deteriorates, so the Deer lies that he needs the hearts of 1,111 children to make a cure. The king then gives an order to capture 1,111 children and imprison them in cages, preparing to have them killed and their hearts harvested. When the protagonists show up in Biqiu, the Deer lies to the king that Tang Sanzang's heart is the best cure. Sun Wukong saves the children, stops the two yaoguai, and exposes their true forms. The Vixen is killed by Zhu Bajie, while the Deer, which turns out to be the White Deer that the Old Man of the South Pole rides on, is taken back by its master.
- Lady Earth Flow (地涌夫人) is a yaoguai who is actually a Golden-Nosed Albino Rat Spirit (金鼻白毛老鼠精) who obtained her powers after practising Taoist arts for 300 years and secretly consuming sacred candles at Vulture Peak. After she was captured by Li Jing and Nezha, she was supposed to be executed but the Buddha told them to spare her life. She was so grateful that she acknowledged Li Jing as her godfather and Nezha as her godbrother. Later, she moved to the Bottomless Pit (無底洞) at Flaming Air Mountain (焰空山) and armed herself with a pair of swords. When the protagonists pass by Black Pines Forest (黑松林), she disguises herself as a damsel in distress to attract Tang Sanzang's attention. Tang Sanzang takes pity on her and lets her accompany them to a nearby temple, but Sun Wukong sees through her guise. She eats six monks in the temple and captures Tang Sanzang when Sun Wukong and the others are distracted. Sun Wukong finds out her true identity later and brings Li Jing and Nezha to subdue her and take her back.
- The King of the Southern Hill (南山大王) is a yaoguai based in Linked Cave (連環洞) on Bent Peak (折岳) at Hidden Misty Mountain (隱霧山). Armed with an iron pestle, he is capable of creating windstorms and mist. When he learns that the protagonists are approaching the mountain, he comes up with a plan to separately lure Sun Wukong, Zhu Bajie and Sha Wujing away from Tang Sanzang and capture their master. Sun Wukong infiltrates his lair later and casts a sleeping spell on the yaoguai and his minions and saves Tang Sanzang. The yaoguai is slain by Zhu Bajie just as he awakes, and his true form is revealed to be a leopard with mugwort-shaped patterns on its body, possibly a snow leopard.
- The Ruler of the Kingdom of Miefa (滅法國國王; "Miefa" literally means "destroy dharma") hates Buddhists and once made an oath to slaughter 10,000 monks. He has already killed 9,996 monks when the protagonists arrive in his kingdom. To evade trouble, the protagonists disguise themselves as horse traders and hide in a big cupboard in an inn. That night, the cupboard is stolen by thieves but recovered by the authorities and brought to the palace. Sun Wukong cast sleeping spells on everyone in the palace and shaved their heads. The next morning, when the king wakes up, he is shocked to see that he, his family members, and his subjects are all bald just like monks. He realises that he has done wrong in persecuting Buddhists so he repents and renames his domain "Kingdom of Qinfa" (欽法國; "Qinfa" literally means "respect for dharma").
- The Tawny Lion Demon (黃獅精), armed with a giant spade, is a lion yaoguai based in Tiger's Jaw Cave (虎口洞) at Leopard's Head Mountain (豹頭山) in the Kingdom of Yuhua, and a god-grandson of the Nine-Headed Lion. When he learns that the protagonists are approaching the mountain, he steals their weapons out of greed. They attack his cave to take back their weapons and end up killing him and his minions. His death leads to the conflict between the protagonist and the Nine-Headed Lion.
- The Grand Saint of Nine Spirits (九靈元聖) is a lion yaoguai revered as the grand spiritual ancestor by a clan of lion yaoguai at Jiuqu Panhuan Cave (九曲盤桓洞) at Bamboo Links Mountain (竹節山) near the Kingdom of Yuhua (玉華國). When he learns that his god-grandson, the Tawny Lion Demon, has been killed by Sun Wukong, he seeks vengeance and captures Tang Sanzang, Zhu Bajie, Sha Wujing and the royal family of Yuhua and has all of them whipped. Eventually, Sun Wukong uncovers the yaoguai's true identity: the Nine-Headed Lion (九頭獅) that the immortal Taiyi Zhenren rides on. He seeks help from Taiyi Zhenren, who shows up to subdue the Lion and take him back to Heaven.
- Roushi (猱獅), Xueshi (雪獅), Suanni (狻猊), Baize (白澤), Fuli (伏狸) and Boxiang (摶象) are six lion yaoguai who used to inhabit the Jiuqu Panhuan Cave before the arrival of the Nine-Headed Lion, whom they honour as their grand spiritual ancestor. They are captured by Sun Wukong and his companions and executed.
- The King of Cold Protection (辟寒大王), King of Heat Protection (辟暑大王) and King of Dust Protection (辟塵大王) are three rhinoceros yaoguai based in Xuanying Cave (玄英洞) on Azure Dragon Mountain (青龍山) in Jinping Prefecture (金平府). Armed with a battleaxe, a broadsword, and a rattan staff respectively, they disguise themselves as buddhas and steal aromatic oil from lamps on a bridge, tricking worshippers into believing that the "buddhas" have accepted the oil offered to them. When Tang Sanzang goes to pay respect to the "buddhas", the yaoguai capture him and flee. Sun Wukong and his companions try to save their master but are outnumbered by the yaoguai and their minions, so they seek help from celestial forces. The yaoguai are eventually defeated and killed by the combined efforts of Sun Wukong, his companions, four of the 28 Mansions, and marine forces led by Crown Prince Mo'ang.
- The Jade Rabbit Spirit (玉兔精) is actually the moon rabbit which pounds a mortar and pestle in Guanghan Palace (廣寒宮) on the Moon. She holds a grudge against the fairy Su'e (素娥), who had hit her before. After Su'e is reincarnated as a princess of Tianzhu, the rabbit escapes from the Moon to take her revenge and lives on Maoying Mountain (毛穎山). Armed with a short staff transformed from her pestle, she kidnaps the princess and impersonates her. When Tang Sanzang passes by Tianzhu on his journey, she wants to marry him so that she can absorb his yang essence and increase her powers. Sun Wukong sees through her disguise and fights with her. Just as Sun Wukong is about to defeat the rabbit, the Moon Deity show up and stop him and takes the rabbit back to the Moon.