Marin Kitagawa: Marin starts the story as our female MC, counter to Gojou. Marin is popular and close to what you could call Gyaru (over-the-top westernized feminine look). She styles her school uniform differently, her hair is long and died blonde with pink tips. She wears long pink finger-nails and bright pink contact lenses. Even in Marin's personal life she is Dressing Up. Marin has friends, is outgoing, has loads of self-confidence and absolutly no shame when it comes to showing off her body. The one thing Marin does not have is someone who understands her love for anime, manga, and cosplaying. Marin has been attempting to create custom cosplays on her own but doesn't posses the talent to finish them in the way she wants. This is when Marin and Gojou cross paths. Gojou has always been able to create clothing, style hair, and do makeful for his Hina Dolls but the one thing he can never get right is creating the faces for his dolls. Marin sees Gojou's love for Hina Dolls and doesnt make fun of him or judge him like he was so afraid of. Marin immediately connects the dots that they both have a hidden love for something that others don't understand. Marin recruits Gojou to help her create and style cosplays for her and the two set off on a journey where they grow close and develop feelings for one another.

Marin and Gojou compliment each other as being what the other is missing. Marin gives Gojou confidence, ambition, a way to speak his mind and the ability to advocate for himself while Gojou brings Marin down giving her a dose of reality with deadlines, expectations, and hard work. Marin finds someone who is passionate about making her dreams come true no matter the cost and Gojou finds someone who is willing to accept him no matter what. Marin can't create cosplays and Gojou can't create faces. In the end Marin becomes Gojou's Dress Up Darling as the two fulfil each others desires for what they want in life.