Ken Kaneki

Ken Kaneki is the main protagonist of Tokyo Ghoul as well as Tokyo Ghoul: Re.

Personality
Ken Kaneki initially started off as a shy, kind-hearted person with an avid interest in books and novels. He was incredibly modest, meek, and selfless. However, beneath his kindness, he had a deep fear of being alone. Because of this, he tried to protect those dear to him.

After being tortured by Yamori at Aogiri, Kaneki's personality began to drastically change. He became completely ruthless and barbaric when protecting his friends, and also showed signs of mental instability.

Plot
At the start of the series, Ken Kaneki was just a regular human being. This all changed when he was attacked by Rize, a ghoul. Ken barely survived the incident, and received Rize's organs as a transplant. This turned Kaneki into a half-ghoul.

As a result of the ghoul transformation, Kaneki had to put up with his hunger, but was opposed to eating humans. Upon finding a feeding ground for ghouls, he was immediately attacked by Nishio, claiming that Kaneki was on his feeding territory. Touka appeared, claiming that it was in fact, Rize's feeding grounds, not Nishio's. Touka defeated Nishio, and tried to feed a reluctant Kaneki who refused, despite his hunger.

Soon, Kaneki was attacked again by Nishio. Kaneki defeated Nishio, but started to lose control and tried to eat his friend, Hide, but was stopped by Touka.

Kaneki woke up at Anteiku and soon started working there part time.