Naki, a ghoul once confined in Cochlea, gains freedom when Aogiri Tree storms the prison. Sworn to Yakumo Ōmori (Yamori) after a failed challenge in the 13th Ward, he adopts his mentor’s finger-cracking tics and hairstyle, addressing him as "Big Bro" with unwavering devotion. This loyalty costs Naki his liberty when he shields Yamori from capture, leading to his incarceration. His stark appearance features a crisp white suit, hollow eyes shadowed by ceaseless mourning, and hair that shifts from a tripartite split to a swept-back homage post-timeskip. The Goat Wipeout Operation claims his left arm, while his younger self is remembered for disheveled locks and patched garments marked by crude stitching. A tempest of impulsiveness and tenderness, Naki’s childlike naivety clashes with fierce protectiveness. Illiteracy fuels verbal blunders—"scientist" becomes "sciencer"—and muddled grasp of basics like directions, though he sporadically wields advanced terms without context. Nights echo with whispered recitations of fallen comrades’ names, a ritual securing his subordinates’ steadfast allegiance. As Aogiri’s enforcer, he clashes with Shū Tsukiyama during the Kanou lab raid, later allying with him against CCG forces. There, he intercepts Akira Mado’s assault on allies Gagi and Guge, enduring critical wounds. Post-Aogiri’s collapse, he forges the White Suits gang, ascending to leadership in Ken Kaneki’s Goat. The Auction arc pits him against Akira again; her trap nearly kills him until Gagi and Guge trade their lives for his. Grief ignites a vengeful crusade against CCG, exposing his reliance on kinship. Dr. Kanou later exploits his hope, coaxing him into experimental procedures on his fallen friends’ kakuhou. During the Rushima Landing Operation, he shields Miza Kusakari from Koori Ui, surviving brutal injuries dismissed by Miza as mere exhaustion. His journey traces a shift from mimicry of Yamori to carving his own legacy within Goat, tempering recklessness with nascent accountability. Ambiguous final dialogues hint at peace in death, embracing reunion with those lost over solitary survival—a testament to bonds forged beyond life’s fragility.