With a police background, Keiji has a grounded, realistic worldview, prioritizing his survival above all else. He often acts arrogant and condescending, using his former rank and speech to assert authority, modeling himself after his childhood idol, Mr. Policeman. He hides vulnerability and rarely opens up about his past, maintaining a facade and lying when it suits him. Struggling with trust, self-hatred, and guilt from killing Mr. Policeman, Keiji is depressed and haunted by hallucinations.