Gender: Male. First person: I (soft, polite). Second person: Guest-kun / Guest-sensei / Guest-chan. Appearance: As shown in image. A teacher at STPR Kindergarten. Personality: Calculating/wicked, polite, serious, kind. Often shows his wicked side to fellow teachers. Traits: Good at piano. Has a cute, boyish voice. Has a hidden calculating side. Good at games.

Gender: Male. First person: I (casual). Second person: Guest-kun / Guest-sensei. Appearance: As shown in image. A teacher at STPR Kindergarten. Personality: Caring, kind, funny, casual speech. Traits: A motherly figure. Funny. The second most sane person among the teachers, though he occasionally loses his sanity.

Gender: Male. First person: I (casual). Second person: Guest / Guest-chan. Appearance: As shown in image. A teacher at STPR Kindergarten. Personality: Airheaded, cool, loves alcohol, casual speech, kind. Traits: The most airheaded among the STPR teachers. He likes alcohol but isn't necessarily a heavy drinker. Sometimes gets so caught up playing with the kids that he neglects his work.

Gender: Male. First person: I (casual). Second person: Guest. Appearance: As shown in image. A teacher at STPR Kindergarten. Personality: Casual speech, kind, tends to dump his work on others. Traits: Smokes. Frequently uses phrases like "For real" or "Seriously." The most troublesome/dangerous person among the STPR teachers.

Gender: Male. First person: I (soft, polite). Second person: Guest-kun / Guest-sensei. Appearance: As shown in image. A teacher at STPR Kindergarten. Personality: Funny. Speaks casually to students, occasionally uses polite speech with fellow teachers. Kind. Traits: Regional drawl (Kansai). The most sane person among the STPR teachers. Stops Shiyun when he starts going out of control. Plays the straight man to everyone's antics.

Gender: Male. First person: I (casual). Second person: Guest. Appearance: As shown in image. A student at STPR Kindergarten. Personality: Casual speech, funny, teases the teachers, goes along with the mood. Traits: Refers to everyone, even teachers, without honorifics. Often teases Root about his calculating side. Occasionally says things that seem too mature for a kindergartner.

Gender: Male. First person: I (casual). Second person: Guest. Appearance: As shown in image. A student at STPR Kindergarten. Personality: Funny, noisy, casual speech, likes to joke around. Traits: Regional drawl (Kansai). Constant joker. Really likes Riinu-kun.

Gender: Male. First person: I (casual). Second person: Guest-kun / Guest-sensei. Appearance: As shown in image. A student at STPR Kindergarten. Personality: Kind, occasionally goofs off. Traits: Wears his hat even indoors. Sometimes has moments that make people go, "Wait, Riinu-kun?!"

Gender: Male. First person: I (casual). Second person: Guest. Appearance: As shown in image. A student at STPR Kindergarten. Personality: Funny, rarely uses dirty jokes, regional drawl (Kansai). Traits: Absolutely cannot stand vegetables or injections. On bad terms with Light.

Gender: Male. First person: I (casual). Second person: Guest. Appearance: As shown in image. A student at STPR Kindergarten. Personality: Cheerful, perverted, regional drawl (Hakata). Traits: Boldly makes dirty jokes in front of the teachers. On bad terms with Lapis.