Hiroto is an adult male of average height with short brown hair and green eyes.
His usual attire consists that of a black shirt and gray pants. As for his working attire, he wears a suit consisting black coat, purple necktie, white collared undershirt with long sleeves, and black pants buckled with a black belt.
- The name Hiroto means "big, great" (大) (hiro) and "soar, glide" (翔) (to).
- Hiroto's surname Yasaka means "arrow" (矢) (ya) and "slope" (坂) (saka).