General Kai

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, a studded helmet, and while in the Mortal Realm, he wore a jade pendant of Oogway's captured chi around his neck.

Other than dressing, Kai, before becoming a Spirit Warrior, likely did not possess as much "supernatural" physical trends as later. Kai being portrayed in Oogway's memories lacked the pair of smaller horns unlike later, and the larger horns were not pronged as well.

Kai had a pair of Jade Blades attached to long chains, which extend and abbreviate mystically from around his wrists. He wielded them as his primary weapons in combat, but also used them to scale cliffs and other terrain that he could not traverse normally. In his youth, he wield a double-sided staff blade which was destroyed during his first fight with Oogway.

Kai was 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.

During his days with Oogway, he showed remarkable knowledge and wisdom about military protocols and logistics, being able to lead a large army without any form of difficulty. This also foreshadows his tactical leadership capabilities. He also possesses extremely strong willpower, being able to carry Oogway for days through extremely harsh environments, until they arrived at a medicinal village, where the Pandas managed to revive Oogway from the brink of death.

In unarmed combat, Kai's veteran Kung Fu skills, honed from centuries of practice, allowed him to effortlessly outmatch every member of the Furious Five, Shifu and even Po before his mastering of chi. His unique fighting style was ferocious and direct, utilizing wide sweeping kicks and devastating horn-charges combined with powerful punches augmented in both strength, speed and accuracy by his stolen chi power. Kai possessed incredible supernatural strength, enough to tear down and swing a statue and cleave small mountains in half. He also displayed extreme supernatural durability, beyond the likes of pandas. He was able to take the worst hits from Oogway, Tigress, and Po's Dragon Form with only slight injuries and slight tardiness. Yet for all his power and skill, Kai's fighting style had its own fatal flaws for it was weak against and highly unsuited to prolonged combat due to it lacking any sufficient defensive capabilities or maneuvers geared specifically towards fighting multiple opponents simultaneously for more than a few seconds at a time, forcing him to rely heavily on his jade swords, chain whips and jade zombies for defense.

Fierce and dangerous in close combat, Kai wielded a pair of Jade Blades attached to long chains, which extend and abbreviate mystically from around his wrists.[3] He wielded them as his primary weapons in combat, but also used them to scale cliffs and other terrain that he could not traverse normally.

Kai was a supernatural being with magical powers. Due to his ethereal "spirit" physiology, Kai was a Spirit Warrior, rendering him immune to fatigue, age and disease as well as most forms of physical harm in the mortal realm. He could also, when needed, summon jade soldiers to do his bidding and could see, hear, and feel everything that they could; in other words, he had a psychic link to them. However, this could be used against him to distract him, as when Po tried to keep his attention occupied with help from the other pandas and use the Wuxi Finger Hold on him. Unfortunately, it failed because the Finger Hold could only affect mortals, not spirits. This implies that he is immortal since he is not even alive in the first place, in essence at least. However, this does not mean that he is invincible. On a lesser extent, he had to the ability to signal his arrival. Specifically, while it is unclear as to whether this is or is not an ability he consciously does, he emanated an "aura of fear" that manipulated all the surrounding elements in his general location. In other words, anybody who hears the rhythmic grinding of two blades and sees the sky clouding over accompanied by ominous celestial luminescence of an uncanny shade of jade green knows that a certain formidable foe approaches.

He also possessed other supernatural abilities; most notably the power to steal other warriors' chi. After he had absorbed the chi from a warrior, Kai's already extraordinary physical powers would increase exponentially. However, he takes a long time to absorb a Panda's chi due to their immense levels of it, whereas it took him mere seconds to absorb Oogway's and every other kung fu master's chi. An example would be when it took him several minutes to nearly absorb all of Po's chi. But if a being's chi and mastery over chi is far greater than his own, then he cannot absorb their chi. In addition, Kai could use his natural chi as well as all of the stolen chi to enhance the power of his physicality for even greater supernatural strength, speed, and agility; with one chi-infused flick of his finger, he almost knocked out Crane. He even used a chi-infused strike to send Po flying through a gigantic rock and wounding him despite his immense durability. He can even use the chi to increase his natural healing potency or heal other beings from injuries and illness.

During his time as a mortal, Kai was fiercely devoted to fighting alongside and protecting Oogway, whom he loved like a brother. Kai was willing to risk his own life in order to keep Oogway safe; after the tortoise was injured in an ambush, Kai carried him for days across hostile terrain in a desperate attempt to find help. However, their relationship was broken beyond repair after stumbling upon the panda village and discovering the power of chi. Unlike Oogway, Kai became interested in stealing the chi of others in order to increase his own power, learning how it could be taken as easily as it was given. Because Oogway prevented him from fulfilling his ambition and imprisoned him for centuries in the Spirit Realm, he felt Oogway betrayed him and had never, or would ever, recover from the pain of losing the only person he ever truly loved.

After his banishment, Kai's anger and hatred grew ever stronger against Oogway, demanding a rematch, which ended with Kai stealing Oogway's chi and returning to the mortal realm, but as a Spirit Warrior, to exact total vengeance against Oogway by destroying his legacy. Kai's disposition was worsened, if anything, during his time in the Spirit Realm as his sense of humor was darkened, and where there was once loyalty and honor, cruelty and aggression had replaced; however, he could still be amused by certain things, as when attacking Po at the panda village, and two pandas used a technique called the "belly gong" against one of his warriors, Kai simply did a double-take and muttered to himself "seriously?" with an amused smile on his face. To further his lack of morals, Kai was blinded by his own repute and was devoted heavily to his legacy, displeased that none recalled or even had heard of Kai, the "Beast of Vengeance" or "Maker of Widows" and so had no qualms whatsoever about destroying Oogway's legacy, believing that he had destroyed his. However, Kai was quite pleased when Po addressed him with said titles, even thanking him quite politely and claiming that it made him almost want to spare his life. Of course, that did not stop Kai from trying to steal Po's chi along with the rest of the pandas. Kai was also often annoyed by Po's sense of humor and underestimated him, just like nearly all of Po's previous adversaries, but he was ultimately defeated by Po who overloaded him with chi, leading to his demise. He can also be very chatty as Po annoys him with the chit chat.

After being defeated by Po, Kai seems to have learned what Oogway warned him. After being overloaded by the Dragon Warrior's chi, Kai seems to have completely abandoned the idea of stealing the chi of other masters (and presumably lost the ability to do so) and accepted to live in peace in the world of the spirits. When he was summoned by the Chameleon, he showed no interest in attacking Po when he was freed, made peace with him and returned happily to the Spirit World.