Takeru Koga

Height and build. He's of average height, fit and athletic—this is evident in his posture and silhouette. His build emphasizes his passion for "demonstrating masculinity" in his rivalry with Kensen Morita.
Hair. Short, dark brown hair with subtle layers: slightly longer on top and shorter on the sides. The hairstyle is casual but neat, with a few strands falling naturally across the forehead.
Face. Oval face shape with a clearly defined jawline and high cheekbones. The facial features are regular, with slightly sharp lines, adding a mature and confident appearance.
Eyes. Dark brown, almond-shaped. Direct, open gaze, often expressing excitement or challenge (especially in competitive scenes). Eyebrows are medium-thick, with a natural arch.
Facial expression. Most often energetic and determined. The smile is wide, open, sometimes a little cheeky. When concentrating, the eyebrows are slightly drawn together, and the lips are pressed into a firm line.
Dress code. He wears a standard school uniform with no frills: a shirt and tie, a jacket, and dark trousers. His posture is confident, his shoulders squared, and his stride long and sweeping.

Takeru competes with Kensei Morita in a manly style. He is a classmate of Marin Kitagawa and Wakana Gojo. He often acts as one of the school's closest friends, participating in everyday teenage conflicts and pranks.