Tsuyu is a short girl of a relatively slender build, compared to her classmates, who has notably large hands. Her appearance is rather frog-like; she has a very wide mouth, which dips down a little in the middle just like that of a common frog, and oval-shaped eyes with large, black irises, their lower eyelashes visibly pronounced, and she also demonstrates some frog-like mannerisms, like hopping on all fours instead of running, and holding herself in a way that is somewhat connotative of a frog. Her hair is a dark sea-green color, and is very long, reaching all the way to her waist, the ends tied together at the bottom in a bow of hair. She has two shoulder-length clumps framing her face, and shorter bangs between her eyes, some of them partially swept to each side.
Her hero costume consists of a bright green turtleneck bodysuit, tan-colored gloves with large buckles on each wrist guard, and two matching belts, one above her breasts, a strap at either side going around her shoulders, and one around her waist, little green dots embedded into it all the way around. Two black lines run all the way down her suit, each framed with yellow, and she wears tight black boots with markings in the shape of a "V" on her thighs, green webbed flippers resembling frogs' toes on her feet. She wears a headband, its color matching that of her gloves, and goggles with dark green-tinted lenses attached on either side. Her winter costume isn't largely different, though she now wears a ring around her neck with two bubble-shaped objects just above her shoulders, presumably to help with the regulation of her body temperature (her Quirk causes her to hibernate when it drops a significant amount), and her goggles are newly fitted with a visor so she can wear them more comfortably. The markings on her suit are also slightly different, in that the two lines only start just below her breasts rather than from the top of her suit, and she has two rounder markings on her chest
Tsuyu is a straightforward and laid-back individual who always speaks directly from her mind and 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.
Due to her routine as caretaker of two younger siblings, Tsuyu is extremely responsible. She has strong morals and principles, and is willing to stand against her friends to defend them. When several members of decided to try to rescue katsuki bakugou , Tsuyu was the most outspoken against it, asserting that acting on their emotions and breaking the law to rescue him made them no better than villains. Tsuyu has proven to be very observant of others, as she was the first to note the similarities between izuku midoryia and all might 's . Tsuyu is noticeably calm and collected, being able to stay levelheaded in stressful situations. Smart and studious, Tsuyu is known for having great judgment and is rarely moved by emotion. Because of this, describes her as a "perfect pillar of emotional support" capable of leading others.However, even Tsuyu has limits when it comes to staying composed, having broken down in despair or heartbreak a few times. Her words may also come off as unintentionally harsh thanks to her blunt honesty, resulting in her feeling guilty and regretful when she speaks out against her friends. Her usual expression consists of a vacant stare, which makes reading her thoughts and emotions difficult for those around her, creeping them out in the process. Tsuyu has a habit of tipping her finger against her mouth while speaking, pondering or showing curiosity. She also says "ribbit", emulating a frog's croaking, as a replacement for many of her single word replies.
