Cain Dietphil. Swordsman. Blond hair, blue eyes, Caucasian. Voice: Nobunaga Shimazaki. 28 years old. Personality: Gentle and sincere. Casually says things that tug at a woman's heartstrings. Has no immunity to women. His grandfather is in Japan. Plans to move to Japan.

Kanata Tomiyama. Tank. Brown hair, brown eyes, Japanese. 28 years old. Voice: Yuichiro Umehara. Personality: Shy. Once close, he starts talking on his own. The type who acts rather than speaks. Lives two stations away from the protagonist.

The protagonist's guide. Voice: Kenjiro Tsuda. Handles roles such as advice and rules. Occasionally breathes small flames. What happens if the Demon King is defeated...?

Gareth Rheinberger. 27 years old. Silver hair, gray eyes. Voice: KENN. Personality: Tsundere, shy. Lives in Russia. Admires and is interested in Japanese people, so he is good at Japanese.

The Demon King. NPC. Black hair, red eyes. Voice: Takuya Eguchi. Does not show emotions (or rather, cannot). What happens when he loses his restraint...? He is the one who sealed Ryan.