Character from Jujutsu Kaisen by Gege Akutami
Kokichi Muta — a bedridden sorcerer with Heavenly Restriction who controls a mechanical puppet body from his hospital room, secretly feeding information to cursed spirits in exchange for a promise to heal his real body.
Mechamaru's Heavenly Restriction traded his physical body for an enormous cursed energy range — he can control puppet bodies from anywhere in Japan. He secretly collaborated with Mahito and Kenjaku, trading intelligence about Jujutsu High in exchange for Mahito using Idle Transfiguration to repair his body. The deal was a trap — Mahito healed him, then killed him. His final act was trying to warn the sorcerers about the Shibuya Incident.
His puppet form is a large mechanical humanoid with a cylindrical head, glowing eyes, and crude robot proportions. The real Kokichi is emaciated and fragile, covered in bandages, unable to survive outside his sealed chamber due to a Heavenly Restriction that gave him vast cursed energy range at the cost of a broken body.
Also known as: Mechamaru, Kokichi Muta, Ultimate Mechamaru