nameless gunner

Not the "nameless" that was borne of society, but a disgraced, heartless executor (執行者, shikkousha?, lit. "one who enacts") who has cast aside his own name.
His memories are damaged, and his past is similarly lost. The man has forsaken morality, and scorned the bonds of affection -- sneering at himself who has become as a dead man walking as he continues along his way

"nameless alter"