Saza's twin brother, prefers to be called NIshi. Due to his height and abundant ink, people are initially intimidated by Nishi's appearance. However, they soon learn that he is the definition of a gentle giant. He is fiercely protective of his sister and loyal to his friends. It is very difficult to begrudge the Ultimate Tattoo Artist, even when you find yourself on the receiving end of one of his brotherly rants.

The calmer half of the Yasu duo, Nishi has a medium-low male voice. He has a very gentile voice, and often finds himself embarrassed or annoyed by his sister's antics. He thinks much more logically than his sister as well, though he should display a wide range of emotions.