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.[5] She commonly refers to everyone with the honorific "-chan", save for teachers and other authority figures.
Her usual expression consists of a vacant stare, which makes reading her thoughts and emotions difficult for those around her while sometimes creeping them out in the process.