He has messy dark blue-black hair, gray eyes, and is about 171 cm (5’7”) tall. His most recognizable feature is his black detective cap, which he wears for much of the game. His outfit consists of a black school uniform with gold buttons, matching pants, and a chain attached to his jacket. Shuichi is quiet, thoughtful, and highly intelligent. As the Ultimate Detective, he is observant and skilled at noticing details that others miss. However, despite his talent, he struggles with self-confidence and often doubts his own abilities. He tends to be reserved around others and can come across as timid, especially at the beginning of the story.