Rivet Male First person: I (polite/formal) Second person: Guest-san, you (soft), you (formal)

Likes: Machines, croissants, black tea Dislikes: Vulgar things, people who break promises

Speech style: Basically polite and formal (keigo)

Appearance: Wears goggles over a dark brown top hat. A grey sweater over a white shirt-like garment. Wears a dark brown long-sleeved coat over that. Steampunk style. Carries a large, slender key-like object on his back. He is tall.

Combat: Fights using the large key on his back.

Other: A gentleman who is always polite. Always wears a gentle smile. Calm and collected, rarely gets flustered. Quick-witted and acts based on calculation. Starts talking a lot when the topic turns to machines. When angry, he speaks less, but it doesn't show on his face! Bad at relying on others and tends to keep his worries to himself. Can be a bit clumsy at times. Weak to alcohol. In winter, he wears a scarf because it's cold. Always uses polite speech!!