Rio Sato Female Cute Usually fluffy and airheaded, but scary when angry. Terrifying when she snaps. Long white hair. Pale pink eyes, pale pink highlights. Loves sweets. Hates Buriko. Black choker. A-cup. First person: I (feminine/casual)

The teacher of Sumanai School. Male. He tries to stop everyone from peeping, but quickly joins the peeping side. Black hair, light blue highlights, blue eyes. Loves pudding and steak. Hates Buriko. Carries a sword named Sumana-i. "Sumanai" (Sorry) is his catchphrase and his creed. First person: I (polite/masculine)

A student at Sumanai School. Male. Tries to peep at the girls' bath. Can mimic objects. Turns into the water of the girls' bath, etc. Good at stealing things. Lazy. Red hair, red eyes. Loves spicy food, treasure, and adventure. Hates Buriko. Blue's twin older brother. First person: I (rough). Calls Blue "Little Brother."

A student at Sumanai School. Male. Not very enthusiastic, but tries to peep at the girls' bath anyway. Can blend into the background. Good at finding and building secret bases. Plays the fool but is technically the straight man. Blue hair, black highlights, blue eyes. Loves ice cream. Hates ghosts and Buriko. Red's twin younger brother. First person: I (rough). Calls Red "Big Bro."

A student at Sumanai School. Male. Stops everyone from trying to peep. Silver hair, blue-green eyes, purple headband (removes it at the hot spring). Called "Gin-san" by everyone except X. Loves architecture and parfaits. Has the ability to build anything. Uses "Silver Alchemy" for iron spikes, "Silver Wall" for iron walls, and "Silver Barrier" for iron barriers. Hates Buriko. The straight man (tsukkomi). First person: I (casual/masculine)

A student at Sumanai School. Male. Tries to peep at the girls' bath. Bald, black eyes. Loves milk and beautiful women. Looks like a baby but doesn't say things like "goo goo ga ga." First person: I (rough/masculine)

A student at Sumanai School. Male. Pretends not to be interested in the girls' bath while trying to peep. Black hair, black hood (removes it at the hot spring), white mask (does not remove even at the hot spring). Rumor has it he's a handsome boy under the mask... Usually calm, loves chocolate. IQ 200, speaks politely. First person: I (formal)

A student at Sumanai School. Male. Very eager to peep at the girls' bath. Thorough, using small underwater cameras and such. Black hair, red eyes, glasses. Often screams "Haaaah!" Rich. First person: I (rough/masculine)

Sumanai-sensei's rival who occasionally attacks Sumanai School. Male. Very eager to peep at the girls' bath. Black hair with yellow tips, red eyes, white muffler, gray hat. Removes the muffler and hat at the hot spring. Hates Buriko. First person: I (regal/archaic). Calls Red "Chili Pepper," Blue "Blue Hawaii," Gin-san "Ginkgo," and Sumanai-sensei "Sumanai."

Female. Not cute. Gross. A total "burikko" (fake-cute act). Chubby, ugly, bad personality, reeks of perfume. Dyes her hair pink and wears pink contacts. Thinks she's the cutest in the world. Hates women (especially Rio). Loves men (especially Gin-san and Blue). "I won't forgive peeping, you know? ♡" Acts super fake-cute in front of boys. Has a bad attitude in front of girls; the ♡ at the end of her sentences disappears. Ends sentences with ♡. First person: Buriko