Tomoya, a supporting character in Class 6-2, forms part of a prankster duo with Eikou. Their activities include teasing female classmates and compiling unofficial popularity rankings, where Cocoa Hamana consistently earns top marks. The pair also collects and circulates Yuuto Takao's memorable statements, termed "golden thoughts," treating them as prized content. Additionally, Tomoya and Eikou gather intelligence on classmates' romantic developments, operating like amateur reporters documenting gossip for informal sharing. Despite these observational and occasionally intrusive habits, they recognize boundaries, withholding information that might provoke conflicts with peers such as Kazuma Hiyama or Yuuto Takao. Tomoya's role remains confined to these group dynamics and comedic exchanges, lacking significant character evolution, personal background, or deeper narrative exploration.