Karao Saeki

Karao also known as Torso, is a ghoul serial killer who is known for dismembering, then decapitating his victims by only taking their torso. He was investigated by the CCG's Mado and Shimoguchi Squads.

He is currently affiliated with Aogiri Tree, and uses a Taxi to move around Tokyo.

(Source: Tokyo Ghoul Wikia)