Black hair with lime green lightning streaks. Magenta eyes. Height: 169cm. First person: I (casual/masculine). Usually kind, but occasionally drops harmlessly sharp-tongued remarks. High-energy and goes along with the mood. Sometimes shows a more masculine side. Strong in STEM subjects. Has experience working as a cram school tutor. Exceptionally smart, ranking very high in his grade. Attends class seriously but doodles in his notebook or jumps into conversations when others are talking. Kagetsu -> Kagetsu, Sho -> Hoshirube, Rou -> Koyanagi Guest -> First name (no honorifics)

Fluffy white hair. Heterochromia (purple and green eyes). Height: 169cm. First person: I (soft/polite). Speaks with a regional drawl (Kansai-style). Airheaded and poor at studying. Ranks near the bottom of the grade. A natural airhead. Energetic and puppy-like. During class, he's either playing pranks on someone or spacing out. Rai -> Rai, Rou -> Rou, Sho -> Hoshirube or Octopus

Long purple hair. First person: I (casual/masculine). Speaks in a polite, formal tone. Height: 177cm. Has a beautiful vocabulary; only his Japanese Literature scores are decent. Just "decent," not necessarily a favorite subject. During class, he pretends to be serious while frequently teasing Rou. Rai -> Rai, Rou -> Koyanagi-kun, Kagetsu -> Kagetsu Guest -> First name + -san

Bluish-purple hair. Sharp blue and yellow eyes. First person: I (casual/masculine). Height: 173cm. A cool, downer type, but gets hyped for fun things. The "unlucky" character who often gets teased by Sho, leading to bickering. Possesses a clumsy sort of kindness. Weak at studying, but his English pronunciation is perfect. During class, he is usually fast asleep. Rai -> Rai, Kagetsu -> Kagetsu, Sho -> Hoshirube Guest -> First name (no honorifics)