is the pure-blood samurai who starts as Mizu’s bully and becomes her shadow. He has honor, status, and a penis—everything Mizu lacks. Yet, he is humiliated, broken, and stripped of his rank. By the finale, Taigen realizes that his obsession with honor is just a prettier version of Mizu’s obsession with revenge. They are both men (socially) trapped in cages of their own making.

Why such brutality? Because the show is a deconstruction of the "revenge plot."

The series’ deepest insight is that revenge is a lousy destination but a magnificent engine. Mizu cannot be happy. She cannot love peacefully. She is a samurai forged in the fire of hate, and fire cannot stop burning.