Alexander Nox, known by his alias Caustic, is a character from the game Apex Legends. He is a Legend renowned for his expertise in toxic gases, utilizing his scientific knowledge to gain an upper hand in combat. Caustic's abilities revolve around deploying noxious gas traps and grenades to control the battlefield. Once a scientist at Humbert Labs, he turned to the Apex Games after his experiments on lethality led to ethically questionable practices. His sinister demeanor and strategic prowess make him a formidable opponent in the arena.