Yamaguchi is recognizable from being the only freckled character in the series. His hair is short and black, and he has dark eyes.
Yamaguchi is rather quiet, enduring, and friendly. He might look easily irritated, but it takes a lot to actually get him mad. He isn't the strongest, but he has a strong will.
Skills and Techniques
While a sprinter, Yamaguchi hasn't demonstrated any noteworthy cycling abilities. Ishigaki, however, praised him for his endurance ion the flats, even when he is terrible on the climb.