Ogawa is a male student in Yūto Ayase's class at Hakujō Academy. He appears exclusively as one member of the trio known as the "three idiots," alongside Nagai and Takenami. This collective label stems from their notorious habit of engaging in nonsensical or foolish discussions during school activities.

The trio shares identical traits and experiences, with no individual development shown. They ritually share identical wishes during New Year traditions and consistently draw fortune slips predicting terrible luck. Academically, their capabilities consistently rank demonstrably lower than other characters in evaluative contexts.

Ogawa's role remains fixed across all official media, including light novels, anime seasons, and OVAs. He serves solely as background comic relief within classroom settings, possessing no personal backstory, relationships, or character evolution. He never appears individually, lacks unique dialogue or plot relevance outside the trio, and no details exist regarding his family, personal interests, appearance, or distinct personality traits separating him from Nagai or Takenami. His entire presence is defined by membership in the trio, without expansion or deviation in spin-offs or extended media.