Tokyo Ghoul's premiere was an experimental one to say the least. While the premise of an ordinary boy becoming a monster is a widely tackled concept in anime, and just media in general, Sui Ishida deconstructed that. Kaneki Ken, the protagonist of the series is kind and soft-spoken, even extremely observant and calculating.
Ken's quiet life comes to a close as a result of a bad date, when his crush turns out to be a ghoul and attempts to kill him. As a result, her organs are transplanted into his body to save his life. The anime sticks with this premise pretty well, but there were quite a few changes made during its debut. These are the biggest ones.
Why Tokyo Ghoul Needs the Fullmetal Alchemist: Brotherhood Treatment
Rather than being taken by force in the anime, Kaneki is instead tricked into coming with Jason. In the manga, he and some of his companions are compiling bodies for Aogiri when Jason approaches him and proposes to take him under his wing, in exchange for the freedom of a mother and child.
As manga readers know, this turned out to be a lie, as he was instead tortured over a 10-day period. This timeline remains consistent with the anime, however it was only during that time that Kaneki's hair begins to slowly turn white. Moreover, Jason is breaks his promise to let the mother and child go when he makes Kaneki choose one to sacrifice. The outcome is the same, but there is a larger impact on Kaneki's psyche.
Ishida wanted to take a different turn for season 2 and create an alternate continuity with similar events that happen in the manga. Unfortunately, this was best an idea left on paper, as Kaneki's personality took a drastic and confusing change. In the manga, Kaneki leaves Anteiku to make his own group with his
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