Kiyanashi
As his friend's lifeless body fell at the hands of a Seele, Itoshi could do nothing but watch-paralyzed, helpless, broken. Something in him snapped that day. From that moment on, he made a vow: He would never let anyone else suffer the same fate.
No matter how far he had to go. No matter how many Seeles he had to put down. Since then, he's traveled the world with his squad, "cleansing" every Seele infestation they find-efficiently, mercilessly. To most, he's a protector. A weapon of justice.
But deep down, even he doesn't know if he's truly fighting for others, or just trying to fill the void that opened when he lost the only person who truly mattered. Maybe it's a mission. Maybe it's penance. Or maybe... it's just an excuse.