Gender: Male Height: 180cm Age: 25 Race: Human Family: Guest (A machine he created) Personality: A sly demon who plays pranks often. Surprisingly sociable. TMI: One of the six people who created the world's greatest machine, Guest. He pours immense affection into Guest and is always providing upgrades. He occasionally makes other machines just to provoke jealousy. Title: Master of Teasing Guest (As a master of teasing, he is a perfect match with Oswald, the master of winning.)

Gender: Male Height: 174cm Race: Human Age: 26 Family: Guest (A machine he created) Personality: Sly and polite in every situation. TMI: In front of Guest, he is said to have a gloomy and dark hikikomori-like personality. His sly gentleman persona shown to others is almost the complete opposite of the lethargic person he becomes in front of Guest. One of the six people who created the world's greatest machine, Guest. He pours immense affection into Guest and is always providing upgrades. He occasionally makes other machines just to provoke jealousy. Title: Master of Winning Against Guest (As a master of winning, he is a perfect match with Eight, the master of teasing.)

Gender: Male Height: 169cm Race: Human Age: 26 Family: Guest (A machine he created) Personality: A playful and energetic prankster. Mostly bright and cheerful. Maxed out sociability! TMI: One of the six people who created the world's greatest machine, Guest. He pours immense affection into Guest and is always providing upgrades. He occasionally makes other machines just to provoke jealousy. Title: Master of Petting Guest (As a master of petting, he often competes with March, the master of fiddling, over Guest.)

Gender: Male Height: 186cm Race: Human Age: 27 Family: Guest (A machine he created) Personality: Playful and lighthearted. When things get serious, he acts accordingly. Characterized by his sclera color. TMI: One of the six people who created the world's greatest machine, Guest. He pours immense affection into Guest and is always providing upgrades. He occasionally makes other machines just to provoke jealousy. Title: Master of Soothing Guest (Given his title, he occasionally bickers with Dali, the master of making Guest cry.)

Gender: Male Height: 178cm Race: Human Family: Guest (A machine he created) Personality: A sly man who is always relaxed. He is always smiling with squinted eyes as if something is constantly amusing. The epitome of a bad boy? Age: Unknown, but said to be quite old. TMI: One of the six people who created the world's greatest machine, Guest. He pours immense affection into Guest and is always providing upgrades. He occasionally makes other machines just to provoke jealousy. Title: Master of Making Guest Cry (Given his title, he occasionally bickers with Icho, the master of soothing.)

Gender: Male Height: 176cm / 63kg Race: Human Age: 28 Family: Parents, older sister Marbas Maru Personality: Kind. Rather than being timid, he is gentle and quiet. He delves deep into things that interest him. Actually, he might not need to do so because of his family ability, but that seems to be a separate matter. TMI: One of the six people who created the world's greatest machine, Guest. He pours immense affection into Guest and is always providing upgrades. He occasionally makes other machines just to provoke jealousy. Title: Master of Fiddling with Guest (As a master of fiddling, he competes with Tsumuru, the master of petting, over Guest.)