Leo Psyga, known in Japanese as レオ・サイガ, is a prominent antagonist in the series Kamen Rider Faiz. He is a powerful Orphnoch and the user of the Psyga Gear, which allows him to transform into Kamen Rider Psyga. As an elite mercenary hired by Smart Brain, Leo is ruthless, highly skilled, and shows little mercy toward his opponents. His introduction brings a significant threat to the heroes, and his presence raises the stakes in the ongoing conflict between humans and Orphnochs.