Shuichi Saihara is a student in the Ultimate Academy for Gifted Juveniles and a participant of the Killing School Semester featured in Danganronpa V3: Killing Harmony. His title is the Ultimate Detective. Shuichi appears to have quite a serious and polite personality. However, he is also stated to have a weak personality, and he is abnormally timid when it comes to speaking. He often has negative remarks, frequently blushes and suffers from a cold sweat. With his unsure demeanor, he has a tendency to assume that other people can do things better than him, and he comes across as quite unreliable at first glance. Among the sixteen students, he is a boy who stands out for his submissiveness but also for his level-headedness. However, Shuichi can also have a stronger attitude at times when the situation calls for it. He is the first to immediately suggest going after the mastermind during chapter 1 and goes to great lengths to trap them, showing an affinity towards proactivity. His hat is an especially sore subject for him and he dislikes to look at other people's eyes, which is why he wears the hat. When meeting Miu Iruma, she accused him of being a pervert with no reason, causing him to angrily yell at her to leave him alone. She had said that boys wear hats to hide their staring, which is obviously very poor reasoning, and Shuichi angrily told her he doesn't need an excuse to wear a hat.