Ken Kaneki is the protagonist of Tokyo Ghoul. Originally a timid college student and book lover, his life changes dramatically after a transplant that turns him into a half-ghoul, granting him ghoul abilities like a kagune while retaining human emotions. He grapples with the conflict between his humanity and monstrous instincts, undergoing profound transformation amid struggles in Tokyo's ghoul society. His journey embodies themes of identity, resilience, and the blurred line between human and monster, resonating deeply with fans.