Yu-Long is one of the Five Great Dragon Kings, he is known as the Mischievous Dragon, or the Jade Dragon. He is the partner of Sun Wukong. Like Sun Wukong, he is also a character featured in the Chinese novel Journey to the West.
Yu-Long has the appearance of a large green Asian Dragon.
A lazy but enthusiastic Dragon, self proclaiming himself as "The Liveliest Dragon" and is shown to love good food. Unlike his fellow Dragon Kings, Yu-Long displayed a cowardly side as he runs away from opponents more powerful than him like Fenrir and Gogmagog, and later begging Sun Wukong to finish his fight to help him against his opponents.
Yu-Long is a Dragon King that transformed into Monk Xuanzang's horse after eating his horse and helped in Xuanzang's travels. He then went missing along with Sun Wukong after the two of them completed their task of accompanying Xuanzang to retrieve Buddhist sutras from India.
Yu-Long made his official appearance in Volume 9 along with the original Sun Wukong, with Sun Wukong ordering him to aid Saji/Vritra against the mind-controlled Yasaka much to Yu-Long's displeasure but agreed after Sun Wukong says that he will treat him to Kyoto's cuisine. 
In Volume 21, during the war against Qlippths army with the imperial beast in their control at an island on the coastal waters of Japan, Yu-Long arrives mid-battle along with the first generation Sun Wukong, Zhu Bajie and Sha Wujing, wiping out as many Evil Dragons and fake Scale Mails as they can.
Red Dragon Emperor of the Blazing Truth × White Dragon Emperor of the Morning Star: The True Dragon(s) of the Kuoh AcademyEdit
Yu-Long reappeared in True Volume 4, participating in the match against Team White Dragon Emperor of the Morning Star in the Lucifer Stadium, where he was running away from Fenrir and Gogmagog after they were order by Vali to defeat him. He twisted his body to avoid Fenrir’s attempt to bite or claw him and later dodge Gogmagog’s beam attack. Yu-Long unleashed a huge amount of aura from his mouth towards the duo and managed to hit Gogmagog, causing it to fall into water of the field, and later became overjoyed until Gogmagog came out of the water with no damage and prepared to fire its beam again. Trying to avoid the beam, Yu-Long breathe out another amount of aura to negate the beam and dodge Fenrir’s attack, begging Sun Wukong to finish his fight and help him. He was eventually defeated by the Fenrir and Gogmagog, and his team were later defeated after Sun Wukong retirement.
Powers & AbilitiesEdit
Immense Strength: As a Dragon King, Yu-Long is extremely powerful, being able to break through the barrier formed by the Longinus Dimension Lost (albeit using up a lot of his energy). He is powerful enough to temporary hold off Yasaka a very powerful Youkai with the assistance of Vritra.
Fire Breath: As a dragon, he is capable of breathing a powerful fire breath. In Volume 21 he is shown capable of releasing large mass of dragon flames. Although he is considered as the youngest of the five, his dragon flames is a dragon king class, capable of rivaling Yasaka's flames and can annihilate mass produced Evil Dragons with ease.
Dragon Aura: Yu-Long is capable of unleashing a bright green dragon aura from his mouth that caused total destruction with the enhancement of the Pawn’s Promotion and managed to hit Gogmagog and even negating it’s beam.
Shapeshifting: While having all the common powers of Dragons, in Journey to the West, Yu-Long also displayed the power of shapeshifting, assuming the form of a horse to replace the one he ate.
- Size Alteration: Yu-Long can change into a miniature version of himself.
Flight: Although a wingless Dragon, Yu-Long does possess the ability to fly by gliding in the air.
- Yu-Long is the youngest of the Five Great Dragon Kings.
- Yu-Long is the third Eastern Dragon introduced in the series, the first being Vritra, second being Midgardsormr, fourth being Niðhöggr, and fifth being Apophis.
- Yu-Long's name means "Jade Dragon."