Nico

Nico is a ghoul and member of the Clowns who also serves Aogiri Tree, known by the alias Big Sister for his flamboyant, theatrical demeanor. Beneath the playful exterior lies a personality drawn to extremes — he is fascinated equally by beauty and by horrifying violence.

His close association with Yakumo Oomori reveals a genuinely sadomasochistic streak, taking as much pleasure in his own pain as in witnessing others suffer, yet Nico is not without some trace of conscience, occasionally showing discomfort with the cruelty he otherwise embraces so openly.

Alongside Oomori and Ayato Kirishima, Nico takes part in the raid on Anteiku that captures Ken Kaneki, delivering him to Tatara — a pivotal act that sets in motion Kaneki's torture and eventual transformation into a far more dangerous fighter.