Gabriel

Gabriel grew up on the Destiny Islands alongside his father Riku who he wasn't aware was his father, Sora, Kairi, Ana, and Nathan.

When the Islands were attacked by unbirths, heartless and nobodies he, Ana and ,Nathan went into hiding as Riku, Sora, and Kairi fought. After a long battle against the swarm of enemies Kairi was killed by a samurai nobody. Sora became blinded by rage and destroyed the nobody but he was to focused on it that he didn't notice the neoshadow behind him and he too was killed. In an attempt to save his friends Riku put all his power into 1 blast and destroyed all but 6 of the enemies, but he was to weak to go on and died. Gabriel saw it happen and therefore tried to go to his father (who he believed to just be his best friend) but was held back by Ana and Nathan. He escaped there grasp and dashed for Riku's keyblade which he was surprised to be able to hold and he dashed across the enemies finishing them off with 1 blow each.

Leaving the islands
1 year later Gabriel wanted to travel the worlds and find a new family so ana accompanied him but when he left to The World That Never Was by traveling through the corridors of darkness, he was attacked by a Twilight Thorn. Even after putting up a fight, using his late father's keyblade(quite skillfully for his second time), he was defeated, and therefore turned into a Heartless. His Nobody, Xirbealg was immediately born In Twilight Town.