Gantungan Kunci Kaneki
Formerly, he was a human studying Japanese Literature at Kamii University and living a normal life. However, everything soon changed after he had Rize Kamishiro‘s kakuhou transplanted into him and became a One-Eyed Ghoul. After joining Anteiku as part-time waiter, he learns how to live as a Ghoul and became known as Eyepatch (眼帯, Gantai).
After being captured by Aogiri Tree, he undergoes a drastic personality change, forming a team with the goal of protecting the ones precious to him and exterminate peoples who threaten the place he belongs to. Because of his Kakuja‘s distinct appearance, the CCG gave him the nickname Centipede (百足, Mukade).
He is currently living under the identity of Haise Sasaki (佐々木 琲世, Sasaki Haise), an Associate Special Class Ghoul Investigator and member of Mado Squad who formerly served as the mentor of the CCG’s Quinx Squad. His memories are initially lost to him, yet during the Tsukiyama Extermination Operation his old personality finally resurfaced, awoken from the “sleep” he had fallen into years ago. His memories are also implied to have returned, as he was able to remember Tsukiyama and even some of his older memories and idealisms. Six months after the operation, ghouls have come to know him by the moniker of Black Reaper (黒の死神, Kuro no Shinigami).
Kaneki’s mental state particularly undergoes extreme changes over the course of the series.
He appears to internalize his negative feelings to an extent that, while being tortured by Yamori, these feelings materialize as a mental construct existing within his mind. This construct takes on the form of Rize Kamishiro and taunts him about his weakness. She explores his past with him, and forces him to confront the feelings of resentment he experienced over his mother’s inability to refuse her sister. By accepting this projection of “Rize”, he embraces far more brutal view of the world.
credit source: wikia.com