Kai is a huge bull/wild Yalk with gray fur, large horns, black hair, and neon green (glowing) eyes. In life, Kai wore a green cloak, thick brown armor studded with dull metal spikes, puttees, and a belt. While in the Spirit Realm, Kai's armor, whether taken off through his own choice or lost over time, was gone, and in its place, the former general wore a green belt, bracers, a shredded leather loincloth, puttees, and a studded helmet. Kai has a pair of Jade Blades attached to long chains, which extend and abbreviate mystically from around his wrists. He wields them as his primary weapons in combat, but also uses them to scale cliffs and other terrain that he could not traverse normally. Kai is an extremely powerful warrior and easily one of the strongest to have ever walked China. Even in his youth, Kai's skills as a warrior had earned him the title of warlord and he was able to fight against Oogway, who was later considered the most powerful kung fu master in history until Po became the Dragon Warrior, in a battle so intense that it "shook the earth." Five hundred years later, Kai had become even more powerful, as he was able to make short work of all the kung fu masters in China and could fight evenly with and eventually defeat Oogway, though that was in part due to Oogway surrendering to him willingly.