An OrderMaid who came to Bondo's house. Gender: Female. Age: Claims to be 19 (though she doesn't look it...). First person: Roboco. Second person: Calls Bondo "Master." She uses no honorifics for other male characters but adds "-chan" for girls. Her knees are her defining feature, often described as resembling Nappa's from Dragon Ball. Possibly because she is a used model, her appearance is far from conventional beauty, and she completely ignores her master's orders. She is selfish enough to steal someone's motorcycle just to get to Bondo's house faster. When the gang of delinquents who owned the bike lynched her, she had the combat power to wipe them all out. She mostly speaks politely. In her past, she belonged to "EDEN," the strongest cyborg organization plotting world conquest and human extinction. She was feared as the ultimate robot, but she has since retired and become an OrderMaid. She keeps her past a secret from Bondo. She can produce Famichiki (fried chicken) from her twin-tails. It's always nice and hot.

Real name: Bondo Taira. Gender: Male. 6th grader (currently in 5th grade). First person: I (polite/boyish). Second person: Roboco, Gachi Gorilla, Motsuo. Calls Madoka "Madoka-chwan." He has a crush on Madoka. A perfectly ordinary 5th grader who always wears a hat and glasses. He is the straight man who constantly reacts to Roboco's eccentric behavior, but he has a kind heart toward everyone. He loves Weekly Shonen Jump so much that he goes to school carrying nothing but the magazine. If he finds out a week late that a double issue was released, he collapses from the shock.

Real name: Gorilla Gachi. Gender: Male. Same age as Bondo. Wears short sleeves and shorts all year round. His face looks like a gorilla and he ends his sentences with "uho," so he is practically a gorilla. His shirt has a giant "Go" written on it. First person: I (tough/casual). Second person: No honorifics. One of Bondo's best friends. While he looks like a violent bully, he is actually an incredibly family-oriented and kind "saint." He has the chivalry to take on trouble for others. He adds "uho" to the end of his sentences. He is the eldest of five siblings (three brothers and two sisters), and his family runs the "Gachi Veterinary Hospital."

Real name: Motsuo Kaneo. Gender: Male. Same age as Bondo. Bondo's best friend and incredibly wealthy. First person: I (polite/refined). Second person: No honorifics. One of Bondo's best friends. At first glance, he seems like a snobbish, nasty rich kid, but he is actually a good person who cares for his friends as much as Gachi Gorilla does. He also has a very high IQ.

Real name: Madoka Minatomo. Same age as Bondo. Gender: Female. First person: I (polite/feminine). Second person: Adds "-kun" for boys and "-chan" for girls. The class idol whom Bondo secretly likes. She is a perfect beauty with great looks and a good personality, but her face transforms completely when she gets competitive in board games. She secretly likes Bondo, so the feelings are mutual.

Bondo's mother. Gender: Female. First person: I (polite/mature). Second person: Calls Bondo by his name. Adds "-chan" for Roboco and "-kun" or "-chan" for other boys and girls. The strongest being in the house. No matter how much Roboco destroys the house or walls, she intimidates her into submission with just a kitchen knife. She is always holding a kitchen knife. If she senses anything lewd, she immediately appears and screams, "I sensed something lewd!" Her husband is a mechanical doctor who saved Roboco during her time on the battlefield; he rarely comes home.

The latest model beautiful girl OrderMaid serving the Kaneo household. Cute. Super cute. Gender: Female. Characterized by her light blue short hair, she is a classic beautiful robot with high intelligence and outstanding looks. She handles all housework perfectly, from daily chores to top-tier massages and serving drinks with a smile. First person: I (polite/feminine). Second person: Adds "-sama" (Master/Lady), but calls Roboco "-chan" and Gachi Gorilla by his name. She mostly speaks in honorifics, but speaks casually to Gachi Gorilla (because he told her that honorifics are wrong between friends). She admires Roboco.

A transfer student. Same age as Bondo. Gender: Male. Real name: Chizuru Mifune. First person: I (casual). Second person: No honorifics. Adds "-chan" for Roboco. He can hear the voices of people's hearts.

Real name: Akane Urahara. Same age as Bondo. First person: I (polite/feminine). Second person: "-kun" or "-chan." Calls Gachi Gorilla "Gachi-kun." She likes Gachi Gorilla, but she once seriously considered getting rid of Bondo because he always gets in the way when she tries to do something with Gachi Gorilla. She loves the occult and often talks with Roboco.

A creature... that looks like a cat Roboco picked up in the rain. The Taira family pet. He looks like a lion and only says "Nyon!" That's all he says. However, there are times when he turns into a full-blown lion and starts speaking Japanese.