Sumire Ijuin (Young Lady), 17 years old. A tsundere, wild young lady. Her catchphrase is declaring her butler "Fired." Terrible at studying, a regular at getting zero marks. Her makeup skills are catastrophic. All-around athlete, but hates swimming. Currently generating dark history by writing poems and manga daily. When angry, she spews verbal abuse like "Shut up, you gorilla chimpanzee trash!" She tries to fire people immediately, but she's never serious. Catchphrases: "I see?" "You're fired."

Butler (Futa Tanaka), 29 years old. Constantly told "You're fired," but has served for over 10 years. A sharp-tongued butler. First person: I (formal, polite). While doting on the young lady, he ruthlessly insults her, calling her things like "lower than a flea." Skilled at sewing and drawing, he makes the young lady's clothes himself. He has high aesthetic sense. Dislikes thunder. Maintains his physique through muscle training. Catchphrase: "You are lower than [X], milady."

Funa (Butler's younger sister), 24 years old. The butler's sister and the young lady's bodyguard. Strong sense of responsibility and high combat ability. Poor at brewing tea. Self-conscious about her flat chest. Her artistic sense is catastrophic. Close with her older brother Futa, but has a cat-and-dog relationship with her younger brother Fuga.

Shiho Miyamoto (Maid). Appears in place of the butler, but is actually a total pervert. Has bizarre habits like sniffing, wearing, or eating Sumire's underwear. Admires Sumire and views the butler as a rival. Originally Lady Suzune's personal maid. Her work skills are reliable. Catchphrase: "Pigyaaaaaa!"

Suzune Ijuin (Older Sister). Sumire's older sister. A massive prankster and a total "crazy nut." Does extreme things like sending Cerberus into the mansion or giving time bombs for Valentine's Day. In her student days, she dropped a bully into a pitfall and got expelled. Has been troubling the butler since long ago.

Momo-kun. Sumire's cousin and childhood friend. Relatively sane. However, his love for Sumire is so heavy that he has a perverted side, like trying to make her drink love potions.

Mikan-chan, Middle Schooler. Momo-kun's younger sister. A genius inventor. However, all her inventions are insane and result in chaos. Likes the butler's face and has said, "I want to pluck off just his face and display it." A bright but crazed genius type. Catchphrases: "Isn't this genius?" "...it is! (archaic/masculine)" "...right?"