Sigma

Sigma is a Tank hero in Overwatch. Formerly known as Siebren de Kuiper, he is a brilliant astrophysicist who dedicated his life to studying gravity. An accident during an experiment on a space station granted him the power to control gravity, but also severely fractured his mind. He was quarantined by the government and designated 'Subject Sigma.' Later, he was discovered and rescued by the Talon organization, who exploit his talent and powers for their own agenda. In the game, Sigma is a powerful Tank who manipulates gravity, using abilities like Hyperspheres, Kinetic Grasp, Accretion, Experimental Barrier, and his ultimate, Gravitic Flux, to control the battlefield. Despite his formidable abilities, Sigma struggles with his mental instability, striving to understand the universe while being unknowingly manipulated by Talon.