Tsuyu Asui, hero name Froppy, is a Class 1-A student at U.A. High School with a February 12 birthday. Her Frog Quirk provides an amphibious physiology, allowing her to stretch her tongue 20 meters, cling to walls, leap vast distances, secrete a mild toxin, and blend partially into surroundings. Cold-bloodedness renders her vulnerable to low temperatures, risking forced hibernation. Growing up with parents often absent due to work, she assumed care for younger siblings Samidare and Satsuki, cultivating a pragmatic, responsible demeanor. Middle school isolation—stemming from her frog-like traits and family duties—eased when she bonded with fellow outsider Habuko Mongoose, recognizing mutual loneliness. This shaped her determination to forge deeper connections in high school. Calm, blunt, and principled, Tsuyu prioritizes honesty and protocol. She initially rejected her classmates’ unauthorized plan to rescue Bakugo from villains, arguing against mirroring lawless tactics. Later, she evolved her perspective, assisting Ochaco Uraraka in reaching out to Himiko Toga amid the Final War Arc, reflecting nuanced grasp of morality. Ranking sixth in midterm exams, she displays sharp tactical acumen, such as linking Izuku Midoriya’s Quirk to All Might’s during the U.S.J. crisis. Combat-wise, she specializes in support, using her Quirk’s adaptability for rescues and team maneuvers—notably partnering with Ochaco to float debris against opponents. Key milestones include saving Ochaco from Himiko Toga at the Training Camp, leading her team strategically in the Joint Training Battle, and grappling with guilt post-Bakugo’s kidnapping, which distanced her from peers until Ochaco facilitated reconciliation. Training refined her Quirk’s camouflage and agility to better support allies without reliance. Trivia highlights her preference for jelly, a hero name inspired by rainy-season frogs, and her original concept as a male character to balance Class 1-A’s gender ratio. She also makes a non-canon cameo in *Kill la Kill* Episode 7.