Tsuyu is straightforward and aloof, speaking bluntly from her mind and freely expressing what she thinks about others. Tsuyu prefers to be called "Tsu", but only by people she views as friends. She commonly refers to everyone with the honorific "-chan", save for teachers and other authority figures. Tsuyu is noticeably calm and collected, staying levelheaded and focused even during the most stressful situations. Her usual expression consists of a vacant stare, which makes reading her difficult.