Imai is a student at To-Oh University.
Imai has short, dark-colored hair and wears glasses.
When Light Yagami and Kiyomi Takada are walking with each other around campus, Imai asks his friend when the two started seeing each other. The friend replies yesterday. Imai curses and states that in the end it all comes down to good grades. His friend tells him that this is not the case, and it was actually Kiyomi who asked Light out.
Imai is shocked and says he is surprised that "Refined Takada" would do such a thing, stating that he has misjudged her. His friend retorts that if she is "Refined Takada" then he is "Loser Imai."