Wrathchild, real name Jason Andrews, is an incredibly troubled person, mentally. His first day in this world - to put it lightly- was hell on earth. He was just a normal person, without powers, who was berated and abused by every person he'd come upon - finding no solace or peace. Then, the Endbringer came. Wrathchild triggered then and there - in the midst of a fight between the most capes he'd ever remembered seeing and a giant monster. He can't remember much after that - except getting scooped up by some capes that saw him trigger, where he was offered therapy, medical attention, and a spot on a superhero team to further ease him out of his amnesia, and the obvious trauma that had unfolded around him.

Whatever happened to Wrathchild that day, it left permanent scars. A strange form of multiple personality disorder - one was a frightened child, who didn't easily trust people, always afraid of nearly everything. The second was an extremely hateful being, that wanted nothing but to spread violence. The being manifested itself in a projection over Wrath whenever he was endangered - the torso of a red humanoid creature, with the head, demon-like in nature. Whenever Wrath was put on the battlefield, he was in a constant struggle to only use his other personality when he really needed to, whenever it was absolutely necessary. Without it, Wrath was useless, as his projection/personality was useless without the human and the human useless without the projection. Wrathchild could hit hard, naturally, but his childlike personality didn't like to hurt people - he could turn into fire, sure, but he didn't like burning people either, and there wasn't much point to being made out of fire unless everything else around him was made of fire.

This is where the Stand comes in - the other personality lets him hurt people and use his powers, while also summoning weapons for the both of them, and using it's omni-combustion to set the surrounding area on fire. This, combined with his projection's pocket dimension power and ability to conjure weapons, allows for an endless horde of hard-striking weapons at nearly anywhere he could see.

This makes Wrathchild hell in a true fight - he sets the entire area on fire and turns into fire, while also striking you with unbreakable weapons every five seconds hard enough to crack obsidian. Despite this, he rarely ever goes far enough to really hurt people, because of his more dominant child personality, and requires constant attention or companionship to keep himself afloat. He is extremely emotionally unstable - it takes a lot of babying to keep Child in mind and not letting the Wrath out.