Tokyo Ghoul is an amazing horror and psychological manga. It has many unexpected turns and tells a perfect story about different worlds. The ones are ignorant humans who hate all ghouls and are afraid of them, the others are ghouls. There are some who kill and hunt people, but there are also some who just want to live peacefully. In the middle of that all is Kaneki Ken who ends up being turned into a ghoul. Being both a human and a ghoul, Kaneki is learning about the reality behind CCG and will try to get them all to accept each other.
#1 Kaneki has a habit of touching his chin with his left hand when he is hiding something.
This habit appears to be subconscious, as he still does it even after his memory loss while under the name Sasaki. This fact was first mentioned by Hide, who told this to Touka. After closely examining this trait of his, we can note that Kaneki has lied a lot of times, for instance, when he left Anteiku, when he talked about his mother, when he said he was happy working at the CCG and not knowing anything.
#2 Beginning with the Aogiri arc, Kaneki has been repeatedly associated with the number “12” in panels. This is a reference to the tarot card The Hanged Man (XII).
The Hanged Man is a card that deals with surrender and sacrifice, as well as many other interpretations. Ishida is well known for his references to the tarot cards and he has used this to foreshadow some of the scenes, future happening, and character developments many times. This lead many fans to believe the theory that Kaneki follows the path of the Fool (0), encountering other tarot cards which were used for other characters.
#3 Kaneki compares himself to Gregor Samsa, the unfortunate protagonist of Franz Kafka’s The Metamorphosis.
In the sequel, he briefly discusses Kafka’s “A Crossbreed” with Arima, another story with strong parallels to his situation. From the very beginning, the story has been developing in a similar manner as in Kafka’s book. Samsa, similar to Kaneki, transforms into a huge insect, is unable to eat normal food, and ends up being rejected by his family who saw him as a monster. It can also be said that this book was the inspiration for Tokyo Ghoul.
#4 The sudden whitening of Kaneki’s hair caused by torture is a condition known as Marie Antoinette Syndrome.
This syndrome is a sudden whitening of the hair, caused by extreme stress or emotional trauma. It was named after the last queen of France, Marie Antoinette, whose hair turned white during the imprisonment prior to her execution by the guillotine. This same thing happened to Mutsuki Tooru as well after she was tortured by Torso.
#5 Kaneki has 16 different names/nicknames.
We are already aware that he has two different names, but beside that, he has 14 different nicknames or aliases: Eyepatch, Centipede, One-Eyed Ghoul, Kakuja’s Egg, Shironeki, Kuroneki, Akaneki, Number 240, Black Reaper, Sassan, Maman, Sasako, Sasaki the Sasarious, and The One-Eyed King.