Kaygen Endless is a mysterious child linked to the Heartless. Kaygen controls the Heartless with an iron fist, and regularly defies Maleficent while designing his own Heartless and sending them to worlds.
Kaygen has black hair and bizarre eyes; one is normal while the other bears a strange insignia. Kaygen usually hides his "insignia eye" with an eye patch.
Not much is known of Kaygen's personality, though he is extremely defiant and independent. Kaygen, despite his connection to the Heartless, still seems to be quite childlike in personality. He can often be seen playing with Heartless. He is also capable of suffering from loneliness.
Kingdom Hearts: Kotsu's RiseEdit
ShadowbaneAs the first creation and faithful companion Heartless that Kaygen created, Kaygen loves Shadowbane and considers him both a pet and an equal. Kagen keeps Shadowbane with him at all times, only sending him out into battle if Kaygen himself is willing to fight. Kaygen keeps Shadowbane by his side and uses Shadowbane's abilities of shape-shifting to aid him when seeking information.