Taisei Sonoda, a student at Itan Private High School, sports slicked-back black hair and adheres to the standard uniform. He forms one-third of the "Class Delinquents" trio with Chiarai Shigeo and Shinobino Mono. The group frequently debates romantic prospects among peers, as seen in chapters 75 and 77, where they analyze ideal dating candidates like Najimi Osana. Sonoda’s name cleverly plays on the phrase *"sonota oozei"* (minor character), underscoring his background status. However, chapter 494 subtly shifts this perception by revealing his quiet affection for Onigashima Akako, a spirited classmate recognized for her snaggletooth and lively personality. While initially framed as delinquents, the trio defies stereotypes through their romantic discussions. Their hypothetical scenarios prioritize emotional bonds and shared interests—such as aligning hobbies or communication styles—over shallow attributes, contrasting traditional masculine tropes. This approach highlights their focus on compatibility and meaningful relationships. Sonoda’s role remains ancillary, contributing to comedic or thematic moments exploring teenage social dynamics without broader narrative arcs.