Ken Kaneki

Ken Kaneki (金木 研, Kaneki Ken) is the main protagonist of Tokyo Ghoul and Tokyo Ghoul:re, and the husband of Touka Kirishima. Formerly, he was a human studying Japanese Literature at Kamii University, living a relatively normal life. However, this soon changed after Rize Kamishiro's kakuhou was transplanted into him, transforming him into a one-eyed ghoul. After joining Anteiku as a part-time waiter, he learned how to live as a ghoul and eventually became known as Eyepatch (眼帯, Gantai).

After being captured by Aogiri Tree, he underwent a drastic personality change and after escaping, formed a group with the goal of protecting those precious to him and exterminating individuals threatening his place of belonging. His kakuja's distinct appearance earned him the alias Centipede (ムカデ, Mukade).

Two years following his defeat against Kishou Arima, he lived under the identity of Haise Sasaki (佐々木 琲世, Sasaki Haise), an Associate Special Class Ghoul Investigator who formerly served as the mentor of the CCG's Quinx Squad. His memories were initially lost to him, but regained during the Tsukiyama Family Extermination Operation. Six months after the operation, ghouls came to know him by the moniker of the Black Reaper (黒い死神, Kuroi Shinigami).

After defeating Arima and Eto having unveiled their joint plan to raise a one-eyed ghoul who could stand as the hope for all ghouls, he calls himself the One-Eyed King (隻眼の王, Sekigan no Ō). Kaneki has since then formed the organization he named Goat, which until recently resided in the underground chambers under the 24th ward, where he married Touka Kirishima, who is carrying his child.

When the Oggai Squads, Juuzou Suzuya, and Hanbee Abara among others invaded the outpost, Kaneki engaged them to buy time for Touka and other members of Goat to escaped. Kaneki was then defeated in conflict with Hanbee and Juuzou, and then mocked by Kichimura Washuu in his state of helplessness, having lost all limbs save his head. Kaneki then summoned all his strength, and regenerated instantly, devouring all of the Oggai, using the thought of Touka to drive him on. However, this was exactly what Furuta intended, and Kaneki then morphed into the Dragon (ドラゴン, Doragon), a huge, uncontrollable kagune which he was trapped inside for three days. He was later extracted from the monstrous appendage by a collaboration between the remaining members of Goat and the CCG.

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Tokyo Ghoul

 * To himself: "I'm not the protagonist of a novel or anything. I’m just a college student who likes to read, like you could find anywhere. But... if, for argument’s sake, you were to write a story with me in the lead role, it would certainly be... a tragedy."
 * To Touka (desperately clinging to his human self): "Why... Why am I doing this? I-I was wrong to eat that meat after all. That was what I thought, and I desperately looked for another way. Even so, this is not what I want. This is not the way! H-Human meat... there is no way I can eat it. How can I possibly eat it, because, I'm human! I'm different from you monsters!"
 * To himself: "In exchange for the pleasure of living as a person that ghouls can have... we receive this instead. We're overwhelmed by our appetites. I understand the feeling of sinking into pleasure. In some ways, it's only natural that... some ghouls like Rize-san exist. However... I'm not going to lose sight of myself. That's my way of fighting."
 * To Nishiki (about human and ghoul relations): "I know... there are ghouls who only see humans as targets to be preyed upon — and on the other hand, there are humans who have decided that ghouls are only inhuman monsters... But I don't think either of those are correct. I think what's necessary is the 'right distance.' Instead of mutually tramping on each others' existence we should just respect each other a little more."
 * To Rize (in his hallucination): "I won't let that happen. Not just Aogiri, anyone who dares to take away my place to be. I won’t forgive anyone who threatens the peace in my life. It’s just like hand-picking coffee beans. For the sake of a good cup of coffee, we pluck out the ones that are trash."
 * To himself (while cannibalizing Kanou's failed experiments): "In this world, the strong devour the weak. Who are the strong? I am. I fucking am!"
 * To himself: "Mother, mother, heey~ I'm distorted. Me? Me? Mememe. Because I'm going to protect everyone..."
 * To himself in a lucid state in Tokyo Ghoul : "M-my fingers... on the plier... C-centipedes... i-in my ears... [laughs] A thousand minus... A-A thousand minus... s-seven... seven is what...?"

Tokyo Ghoul: Days

 * To Hide: "Cain used to be seen as evil, you know. Well, I mean, he can be understood as being 'evil' now, too. But if you just think about Cain, you can kind of see that he had to do what he did to be able to carry on, I think. It would've been unbearable for him, you know?"
 * To himself (internally): "I want to be a bridge, telling ghouls how people feel and letting people know what ghouls think and feel. Because there's nothing but hatred between the two groups now, but if each had an understanding of the other, I think that could change. Even if my presence is unwanted, I still want to be involved with both humans and ghouls."
 * To Touka: "Fiction books give the reader a chance to step away from their own reality and into the shoes of the characters, and they show you a world that isn't the one you already know. And sometimes the story's not so different from you own, and it lets you get closer to your own feelings. So when you close a book you've just finished reading and return to reality, all the pain and sadness you couldn't put into words before are still there on those pages. And that can be comforting."
 * To himself (internally): "Sometimes you're confronted with the ugly parts of yourself that you don't want to see, but books can also tell you a lot about the things you didn't notice when you're just trying to get through somehow."

Tokyo Ghoul:re

 * To Haise (in a dream): "That excellence right now is a nuisance. That's right. Donato has to keep proving himself. He wants to prove just how valuable he is. Isn't that the case with you as well? Because you are the same as Donato. All you're doing is indulging in this twisted self-value that you have to yourself. And if you don't, you won't last. Eventually, you will break and become useless. Once that happens, you'll break and become discarded. Right, Haise?"
 * To himself: "I... might die today. No... to be correct... it's either I die, or I disappear. There's only two options. The power I need to deal with him... is way too much... if I have to resort to him... I will... disappear."
 * To Akira: "Why, why are you hiding it?! Is... Is it because I'm the Eyepatch ghoul? Is it because I was the one who killed Amon Koutarou? The fear of waking up and knowing nothing. Do you know what that's like? How I can only cling onto what's given to me... How I don't even know my own parents... Where did I even come from...? I... I... Who am I? I'm not Haise!! I am... I am..."
 * To Urie: "All losses in this world are due to a lack of ability. If you want to curse something, curse your own weakness."
 * To Hide in his thoughts: "...Hide. I... just like you, I want to give my life for someone else (I want to die in style)."
 * To Hide (in his mind): "Hide... You know... I... I'm so lonely without you..."
 * To himself (accepting himself): "Black and blue, turning and over-turning the things I'd chosen countless times, forever repeating the same actions... Ungainly. Awkward. Indecisive. Weak. Endlessly useless. That is what I am."
 * To himself: "At Death's door, I finally stumbled upon the twisted truth. Rize, Hide, it was always all inside me, after all. They were nothing but an extension of myself. The people I want to meet. The things I want to be told. 'Hide'll stop me for sure.' As soon as I began to think that somewhere inside me, I myself began wishing for it. Wishing that I'd live."
 * To Kiyoko and Mougan: "I am the One-Eyed King."
 * To the ghouls: "I will carry on the last wish of the previous King, and create a world where ghouls and humans can understand each other."
 * To the ghouls: "'Ghouls are to be exterminated.' 'In order to live, we must kill and eat humans.' The reason our mutually destructive relationship has never changed is because we have never, together, made an attempt to [make] even the smallest step forward. Ghouls and humans can understand each other... The fact that I, who was once a human, stand here before you is proof enough."
 * To Amon: "It's because we're the same. Isolated from society, able to consume a few specific things... They remind me of myself. I really believed I was a kind hearted human, but... I was mistaken. There were a few humans that were important to me, but I couldn't care less about the majority of them. I don't care about taking the side of those I cannot see. I fight for those close to me. And it just so happens that they're mostly ghouls."
 * To Shinsanpei: I'm not that much of a pushover, greenhorn."
 * To himself: "I won't pull back, I will press forward, like a centipede."