Akutagawa calls himself the "dog" of the Port Mafia and is more than ready to commit crimes and various acts of violence to achieve the goals of the organization. He respects the mafia hierarchy, but considers the betrayal of the organization by his former boss Osamu Dazai unworthy.

Akutagawa usually keeps a cold and serene expression on his face, but it is not uncommon for him to notice outbursts of anger and envy. Does not like weaklings and those who put pressure on pity. He never shows weak