Yoshida is a male high school student with black hair, appearing as a secondary character in Harmonie. He belongs to the friend group of protagonist Honjou Akio, engaging in casual daily discussions about anime episodes from the previous night. These conversations form part of Akio's routine school life. Yoshida inhabits the lively classroom setting of class 2-1, comprising 34 students, each immersed in their own distinct world. His role contributes to establishing the ordinary high school atmosphere and Akio's social circle.