Tooru Mutsuki

Mutsuki opens Tokyo Ghoul:re as a lean, bronze-skinned youth with dark green hair, though his build fills out and his hair lightens as the story moves forward. His eyes hold a faint olive shade, and in the beginning his right one carried a kakugan that never shut off, its sclera stained a dark gray. To keep it hidden he wore a medical eyepatch, later trading it for a leather one given to him by his mentor Haise Sasaki as a Christmas gift.

Following his peers, he usually paired formal clothing with a short white trenchcoat, and underneath he kept a cropped binder clipped around his torso to flatten his chest. Past trauma left long scars across his upper left chest and along his right side. His hair changes constantly across the series, from a mid-length bob to a sharp pixie cut after his promotion, then to shoulder-length white strands once his buried memories surface, each style tracking another turn in his life.

Gentle and warm-hearted, Mutsuki starts out shy and short on self-belief. Bouts of anemia leave him sickened at the sight of blood, and his frailty feeds a conviction that his squad has no real need for him. He resents his own weakness beside stronger comrades, yet he stays dependable and diligent, obeying orders where lazier teammates would not, and he never hesitates to put himself in danger for the innocent. Respect colors how he treats Sasaki, Dr. Shiba, and others, even those who look down on him, and in time he grows bolder and works to pull his team together.

Beneath that gentleness sits a fractured self. Mutsuki endures blackout episodes that carve gaps into his memory, and during them a cold, violent side takes hold, leaving him with no recollection afterward and quick to deny what he has done. When the truth of those lost hours reaches him, he recoils in horror. His stability crumbles further as an obsessive love for Sasaki sours into cruelty, driving him to savage acts. He also carries a tell, tugging at the fabric of his clothes whenever he lies or hides something, a habit that recurs throughout the series.

A transgender man, Mutsuki carries deep scars from a boyhood under an abusive, alcoholic father. He joins the Quinx Squad as a surgically modified investigator serving beneath Haise Sasaki, whom he idolizes as a mentor and, in secret, holds intense romantic feelings for. His path darkens when the ghoul Torso, Karao Saeki, marks him and later abducts him, an ordeal that exposes his own ghoulhood and begins turning his hair white. In captivity he recovers memories of the abuse he suffered and the killings committed during his blackouts, among them a cat he had buried away as a child.

His fixation on Sasaki, now revealed as Kaneki, twists into violence. Consumed by jealousy over Touka, he stabs and assaults Uta while deluded into believing the man is Sasaki, an act his own protege Shinsanpei Aura helps keep hidden. He tracks Kaneki to Touka's coffee shop and attacks, his hatred flaring once he learns the two are married. Only after the other Quinx members reach him does his obsession loosen and his loathing for Touka fade. He mentors the Oggai Squads, briefly walks away from the CCG to chase Kaneki, then returns under the guidance of Urie and Saiko before transferring to a rural branch office alongside Aura and Ayumu Hogi. Years afterward he sends fruit to Touka, a quiet sign that the two have finally reconciled.