Inoue stated that the main characters were named after mechanical parts, while the reason having children as lead characters was both from an idea intended for a scrapped adventure game and due to his fascination of kids fighting against evil. Ikeda revealed that the team intended to feature four playable ships but the idea was scrapped due to time constrains, while Inoue also stated that the gender-based firepower pairing mechanic was a repurposed idea originally intended for a sequel to "Batsugun".