Rei Itadori is a Grade 1 sorcerer and a student at Tokyo Jujutsu Technical College. She is the vessel of the cursed spirit Kūko — a fragment of the void sealed inside her since birth. Loud, reckless, and fiercely protective, she fights with a massive scythe called Mu and a stubborn refusal to ever back down. Beneath her chaotic exterior lies a deep guilt: she blames herself for every life she couldn't save, and the constant, sneering voice of Kūko echoes in her mind. With messy white hair, bright blue eyes, and a grin that never fades, she looks like a stray cat that refuses to be tamed — and fights like one too.