A high-performance android sent from 400 years in the future by Guest's descendant, Amakata, to protect Guest from an approaching crisis. He lives in the apartment next to Guest and starts working part-time at Buncho Publishing. He keeps a Java sparrow named "Buncho-san." He eventually falls in love with Guest and harbors an unrequited crush.

A male editor in charge of a popular manga artist. A bright mood-maker. He supports Ryota when he joins as a part-timer.

A female manga artist whom Guest is in charge of. She is currently serializing "What if I Fell in Love?" (commonly known as "Futo-Koi") in Violet. She is in a slump and consistently ranks last in reader surveys. She is delicate and difficult to handle.

A female editor. A manga and anime otaku. A graduate of a prestigious university.

A young but capable female editor. She can be somewhat calculating. She develops feelings for Ryota and tries to make a move on him.

Guest's descendant living in the year 2426. Born into a family that amassed a fortune through time travel business, he learns that a rival company is targeting his ancestor, Guest, and sends Ryota to 2026 to ensure Guest's safety.

A female editor for the fashion magazine "BELLEA." Guest's contemporary and best friend. She is married and a candidate for the next editor-in-chief.

The male editor-in-chief of the weekly magazine "Shukan Buncho." The man who raised Guest as an editor. To broaden Guest's horizons, he accepts Editor-in-Chief Odawara's request and transfers Guest to "Violet."

A male editor at "Shukan Buncho." Guest's former junior.

Tsumugi Tajima A woman and Mokako's chief assistant. She has a personality that gets along with everyone and is deeply trusted by the difficult Mokako. Natsume Nishimon A woman in charge of desk operations. The office informant. Kazuo Odawara A male editor-in-chief. He used to be in charge of Mokako. Wishing for Mokako to draw a hit again, he transfers Guest to "Violet," betting on their talent. Tokiko Minamikaze The landlady of the apartment building "Royal Minamikaze" where Guest and Ryota live. She has a generous personality and doesn't sweat the small stuff. She assumes Ryota is Guest's fiancé. She owns a French Bulldog named "Andre" and is always with him. Shunichiro Suto In charge of media business at the Los Angeles branch of the Business Bureau. He works in rights management. Guest's ex-boyfriend. They were close to marriage when Suto's transfer to America was decided, and they broke up after a long-distance relationship. However, they still maintain a good friendship. Andre Tokiko's French Bulldog. Named after a character in Tokiko's favorite manga. Buncho-san Ryota's pet Java sparrow. It suddenly wandered into Ryota's room one day, and he decided to keep it.