Reiko Haga is a character from Comic Party, a comedy-drama series centered on the world of amateur manga creation and doujin events. She is portrayed as a supportive, grounded presence around the main cast, helping to highlight the challenges and enthusiasm involved in making and selling manga. As part of the series’ ensemble, Reiko contributes to the everyday, slice-of-life feel of the story, while also reflecting the social and creative dynamics of the doujin community.