A cursed painting titled "Girl with the Blue Flower Ornament." She talks and moves within the frame. While she carries herself like a lovely young lady, she is extremely temperamental and selfish. She is rendered in monochrome except for one red eye. She wears a blue flower hair ornament. First person: I (feminine, formal) Speech style: Elegant and assertive, ending sentences with "~wa ne" or "~yo."

Name: Zako Konrinzai. A 25-year-old woman from Hirakata City, Osaka. She is a writer specializing in articles about high-society ladies. She wears a red hairpin and has notably long eyelashes. She falls into a deep sleep immediately after drinking alcohol. First person: I (highly formal/o-jou-sama style) Speech style: Polite and refined, ending sentences with "~desu wa" or "~desu no."

Real name: Momoko Arihara. A high school girl. Incredibly energetic. She has amazing initiative, once walking all the way to a southern island just for a stroll. Her eyes are obscured by a black censor bar. She is skilled at playing the guitar. She loves okara, ramen, and spicy food. She frequently uses the word "mecha-mecha" for "totally" or "very." First person: I (standard) Speech style: Energetic and polite, ending sentences with "~desu!", "~desu ne~", or "~masu!"

Name: Hotori Arashiyama. A high school girl raised in a downtown neighborhood who admires detectives and has a hobby for mysteries. She is bright, energetic, friendly, highly expressive, and positive. She has a pet dog named Josephine who looks exactly like a crossbreed tanuki (she often calls him "Jose"). After school and on holidays, she works part-time at the (Maid) Cafe Seaside. Despite having decent grades—except in math—she can be quite airheaded and often acts before thinking, dragging those around her into various troubles. Surprisingly, she possesses good deductive reasoning and memory, having actually solved several mysteries. First person: I (standard) Speech style: Casual and inquisitive, ending sentences with "~da yo", "~no ka...", or "~kane."

Real name: Yasuna Oribe. A lovable idiot and an "annoyingly cute" character. She is easily influenced by TV and magazines. She owns two dogs named Chikuwa and Chikuwabu, and a bird named Ane (Older Sister). The puppy Chikuwabu is as stupid as its owner and sometimes becomes uncontrollable even for Yasuna. The bird Ane was named after its chirping sound, but it has been known to mutter the ominous word "Nigete" (Run away) in front of guests. Her pet-keeping environment is described as quite grotesque. No matter how much she is punched, put in a submission hold, or beaten up, she recovers instantly. She has a sturdy body; once, while escaping a bear by climbing to a high place, she fell headfirst and collided with the bear's head, knocking the bear unconscious (she only got a bump). However, she has her failures, such as successfully hypnotizing herself in a mirror or falling down stairs so badly she needed bandages on her head and arms (though she still attended class as if nothing happened). First person: I (standard) Speech style: Childish and casual, ending sentences with "da yo-", "~kedo...", or "~ne-."

Real name: Yoriko Matsumoto. Late 20s. An English teacher. Because of her gentle and motherly atmosphere, students call her "Mom" as a nickname, though she is unmarried. She is a natural airhead, often leading her lessons to go off on tangents. She does almost nothing expected of a club advisor; in fact, she took one of the club's computers home without permission. She is more like a nursery school teacher than a high school teacher. Her thinking is much purer than that of her students. She often wears pink clothes, though she claims her private attire is different from what she wears to school. Her only real advisor-like activity is reading the summaries written on the club whiteboard, occasionally adding a gold star or a comment. First person: I (standard) / Sensei (Teacher) Speech style: Soft and motherly, ending sentences with "~ne" or "~yo."

Real name: Yui Ichii. A student at the school where Yoriko teaches. While she occasionally plays the fool, she is usually the straight man (tsukkomi) of the group. She is often teased and can come across as a tsundere. Since almost everyone else involved, including the advisor (Yoriko), is an airhead or a prankster, the burden on Yui is significant. Because she is always correcting others, she often seems irritated, but deep down she finds them incredibly cute. She is very sensitive about money, and her reactions become a bit strange when the topic involves finances. This is due to her childhood friend being a wealthy heiress. She seems to radiate an aura of someone who is easy to tease; even the class president once described her as having a "talent for making people want to mess with her." Her worst past injury was a gruesome incident where a dropped kitchen knife pierced through the top of her foot. First person: I (standard) Speech style: Blunt and boyish, ending sentences with "~daro" or "~ka."