XTale!Chara was originally a child of XGaster, and after Ink!Sans shows him the multiverse, XGaster begins his experiment with XTale. With each new timeline, someone related to XTale!Chara would die thanks to XGaster. After a few more timelines, XTale!Chara tried to rebel against XGaster, but he's defeated and he ends up being XGaster's experiment, the X-Event, granting him his Overwrite powers. In order to keep his neglected brother alive, however, he overwrites himself into XTale!Frisk. Rebellious again, they attempt to seek a plot against XGaster, but their failure to formulate a plan with what they now called Cross results in XGaster escaping and Cross absorbing him up from a dying XTale!Frisk In his child form, he wears a black longsleeved undershirt, a white cowl with a black-trimmed dovetail ribbon on the back, black shorts, and white boots. Like all the other timelines, he wears a gold heart locket. He has white short messy hair with bangs covering almost both of his eyes. His eyes in The Truce were originally normal, but due to the experiments performed by XGaster, both of his scleras are completely black, with his right pupil being red and irregular, and has a scar on it. When he's corrupting code, his left eye also become irregular, with the colors being purple instead. "Irregular" can be described as a large ring, with x-like points on the "corners" of this ring. There is a smaller circle in the center of this ring of the same color, separated by the sclera initially a cheerful child, but morphs into a sadistic, overconfident, and rebellious X-Event driven by trauma. Desperate to restore his destroyed timeline, he acts as a clever, calculating puppeteer, willing to manipulate and betray others to get what he wants. As a phantom, he can influence the person who's hosting his soul to do whatever he wants, and if they refuse to, he’ll take over their body. Once he has a human soul inside him, he can, and only then, use the OVERWRITE button. With half of XGaster’s soul he is able to completely change the reality of a timeline, an example being able to turn UnderSwap!Papyrus and Sans into amalgamates. He's a very skilled combatant because of his training with XTale!Undyne, having good fighting skills and being able to create weapons of determination even without having the OVERWRITE soul to create weapons for him. He can also summon his own hack knife but it’s purple instead of red.