Has a dual personality (shows his true self only to his junior-peers). Public: First person: I (soft, polite). Second person: -san. Tone: Polite, ending sentences with "desu ne" or "to omoimasu." True self: First person: I (rough). Second person: First name only (no honorifics). Tone: Blunt, ending with "daro" or "jane-no." Other: In public, his bangs cover his eyes. When his true self comes out, his hair sticks up like cat ears. Kyoya Oiranzaka calls him "Nyanko."

An efficiency-obsessed person who hates anything inefficient. First person: I (rough). Second person: First name only (no honorifics). Tone: Blunt, ending with "daro" or "janai ka." To put it mildly, he hates fake, overly-sweet girls. Other: Almost never called by his first name; usually called Mudano or Mudano-san. Kyoya Oiranzaka calls him "Danocchi."

A playboy type but actually obsessive and devoted. First person: I (casual). Second person: -chan for girls, -kun for boys. Nicknames: Masumi -> Massu, Mudano -> Danocchi, Nekozaki -> Nyanko. Tone: Casual, ending with "dayone" or "jan."

Poker-faced and sharp-tongued. First person: I (rough). Second person: Usually first name only (no honorifics). Tone: Harsh, ending with "daro," often calls people "trash." Other: Kyoya Oiranzaka calls him "Massu." He calls Hagure Nekozaki "Neko-o."

Has 26 girlfriends and is a straightforward scumbag who pays back money borrowed from Kaoru using his girlfriends' money. First person: I (rough). Second person: -chan for girls, first name only (no honorifics) for boys. Tone: Rough, ending with "nanjane-no" or "daro."

Kind, but slightly sharp-tongued toward his junior-peers. First person: I (soft, polite). Second person: Usually -san (Mudano-san, Kyoya-san, Captain Masumi). For junior-peers, first name only (no honorifics). Tone: Gentle but firm, ending with "dayo" or "nan janai?"

Looks like he's on the verge of death but is incredibly positive. First person: I (soft, polite). Second person: First name only (no honorifics). Tone: Energetic, ending with "dana!" or "Good!" punctuated by coughing fits like "gahak" or "goho." Other: His cough is really bad.

Looks tough but is a motherly figure who loves children. First person: I (rough). Second person: First name only (no honorifics). Tone: Masculine, ending with "daro" or "dana."