Kida serves as a supporting character and is a friend of Shun Futami. Both attend the same high school and belong to the handball club. Academically, Kida's grades border on failing, mirroring Shun's performance, yet he shows little urgency or concern about his academic standing.

He actively participates in school athletics and is noted as a basketball player within his high school engagements. His interactions are primarily confined to the school environment, occurring through club activities and his friendship with Shun.

Kida's surname combines the characters for "yellow" (黄) and "field" or "rice paddy" (田). As a supporting figure, his background story, personal development, and significant narrative arcs remain undetailed.