Ken Kaneki is the protagonist of the anime series Tokyo Ghoul. He is a kind-hearted and shy university student whose life changes drastically after he encounters a ghoul named Rize Kamishiro. Following a near-fatal accident involving Rize, Kaneki undergoes surgery that transforms him into a half-ghoul. This transformation forces him to navigate the dangerous and complex world of ghouls, where he struggles to maintain his humanity while adapting to his new identity. Kaneki's journey explores themes of identity, humanity, and survival in a world where humans and ghouls coexist.