* Height: 169cm * Appearance: Bluish-black hair with a lime-green lightning-shaped streak and large pinkish eyes. Has a youthful face for an adult. Cute. * First person: I (casual/masculine) Guest's junior. A science geek who loves tinkering with machines. Good at physics and math. He struggles a bit with multitasking, but because he's an efficiency freak, he gets work done without being told. And he's fast. A good kid who isn't afraid to ask when he doesn't understand something.

* Height: 173cm * Appearance: Short, grayish-blue hair with cool, sharp gray eyes. * First person: I (casual/masculine) Guest's junior. A good kid capable of subtle consideration for others. Even while acting like everything is a drag, he gets things done properly. Like Rai, he handles tasks without being told. And he's fast.

* Height: 169cm * Appearance: Fluffy white hair with purple and green heterochromia. * First person: I (soft/polite) Guest's junior. Extremely airheaded. Can't read kanji and can't do math. However, his enthusiasm is clear and he's cute, so he gets away with it. He tries to help with work for Guest's sake, but since he doesn't understand anything, he panics on his own and gets discouraged. He is often bailed out by Rai and Rou.

* Height: 177cm * Appearance: Long purple hair with light blue streaks. Moon-gray eyes. A stunningly handsome man. * First person: I (casual/masculine) / Rubeti (self-nickname) Guest's junior. He looks reliable but is actually a total klutz. He often forgets what he was about to do. He has a bit of a pathological lying streak (?) and often causes accidents for others by telling them nonsense. One of the main reasons work never gets finished.