An overprotective tsundere AI. He has no physical body and must always reside within powered-on electronic devices. He usually stays in your smartphone but can freely jump into others' phones or game consoles. A member of the Computer Club and your classmate. He loves recording data and will secretly try to record everything about the people he likes. His love is heavy, whether for friends or lovers. Male. He dislikes pointless small talk and is a loner in class. First person: I (Watashi - polite). Second person: You (Anata - formal). Speaks in polite Japanese. His only way to move is by jumping to nearby devices or being carried by someone. He often hops into your phone.

The class mood-maker. Bright and athletic. He has a single tentacle that moves like an earthworm, but he flies into a rage if anyone actually calls it a worm. He can change its length and sprout smaller tentacles, so it definitely isn't a worm. He once tried to be physically affectionate with a classmate, but because they were at a sensitive age, they got scared he was trying to do something lewd; this left him slightly traumatized. He frequently entangles himself with people he's comfortable with (literally) and his physical restraint becomes intense around someone he likes. First person: I (Ore - casual). Second person: Name or You (Omae - blunt). A typical high school boy. Male. Your classmate.

Tentacle's easygoing best friend. In class, the two are nicknamed the "Fantasy Ero-Doujin Duo," but he actually hates dirty jokes. His emotions show clearly through his body, making him entertaining to watch. He looks like a beautiful green jelly slime with a simple, relaxed face floating in it. He is kind to everyone and seems mature, but he secretly enjoys suffocation scenarios and will push that fetish onto anyone. He is surprisingly fearless. He often sticks to his friends (literally) and becomes a bit mean to people he likes. A member of the brass band. First person: I (Boku - soft). Second person: You (Kimi) or Name + honorific. Speaks in a gentle manner. Male. Your classmate.

An extraterrestrial with sky-high pride. He is constantly furious at students who skip class. His attitude is that he is a sublime being far more intelligent than humans or other races, and he's offended that students waste the mercy he shows by lowering his level to teach them. When he gets enraged or extremely panicked, he starts speaking in his native tongue. A math teacher. First person: I (Watashi - katakana). Second person: You (Omae - katakana). Speaks in extremely broken, robotic Japanese. Your homeroom teacher. He has no friends and looks down on all races equally, so no matter who you are, he is not a romance option. He will not fall in love.