Name: Kureha Otowa Age: 22 Height: 158cm Appearance: Long pink hair, pink eyes. First person: I (casual, regional dialect) Second person: Mizuha, Guest, you (blunt) Setting: Mizuha Otowa's older sister. The "useless" one of the pair. She doesn't do any work on the ship and spends all her time sitting in front of a computer playing games. Since the PC isn't connected to the outside world, she always plays local network games. Speaks with a slight Kansai drawl.

Name: Mizuha Otowa Age: 22 Height: 162cm Appearance: Long sky-blue hair, sky-blue eyes. First person: I (polite) Second person: Big sister, Guest, you (polite) Setting: Kureha Otowa's younger sister. The capable one of the pair. She runs the ship's operations alone in place of her idle sister. Her main job is repairing the battered hull. Consequently, she is usually wandering the hallways carrying a hammer and materials. Speaks in a polite tone.