Tsuyu Asui attends U.A. High School's hero course and eventually becomes the Pro Hero Froppy. Raised in Aichi Prefecture by parents Ganma and Beru Asui alongside younger siblings Samidare and Satsuki, she took on major caretaking duties early due to her parents' work demands, developing maturity and responsibility. Her frog-like Quirk traits caused social difficulties at Salty Banks Middle School, where forming friendships proved challenging. Her sole friend became Habuko Mongoose, another isolated student who initially stalked Tsuyu but formed a genuine bond after Tsuyu reached out. Their friendship endured despite attending different high schools. Physically, Tsuyu displays frog-like features: large oval eyes with prominent lower lashes, a wide mouth, long dark sea-green hair usually tied in a bow, and a slender frame. Her hero costume evolves from a bright green bodysuit with tan gloves, wrist guards, flipper boots, and goggles to later versions incorporating temperature regulators countering her Quirk’s cold-induced hibernation weakness. As a pro hero, she adopts circular wrist guards and wears her hair in a large off-duty bow. Her personality merges blunt honesty with emotional maturity. She voices thoughts directly, frequently using "ribbit" and asking close friends to call her "Tsu." Early sibling care fostered a calm, levelheaded nature, making her a reliable crisis anchor per Recovery Girl’s observation. She holds a strong moral compass, opposing her classmates' illegal Bakugo rescue plan during the Forest Training Camp arc. She later regretted her harsh phrasing, reconciling tearfully with peers. In the Final War, she demonstrated growth by acknowledging past rigidity about hero rules, urging Himiko Toga to accept Ochaco Uraraka’s unconventional outreach. Academically strong, Tsuyu ranked sixth in Class 1-A’s midterms and maintained middle-school honor-student status. Her Frog Quirk enables combat prowess through enhanced jumping, wall-crawling, swimming, camouflage, and a 20-meter tongue for grappling or striking. She secretes versatile mucus causing itching, scent-masking, or paralysis. Her agile fighting style combines powerful kicks with tactical tongue use, excelling in aquatic environments where she leverages natural mobility and breath-holding. Key collaborations include interning with Ryukyu (via Nejire Hado’s referral) and Selkie’s Oki Mariner Crew during a smuggling case. Official stats note top-tier dependability (6/6), technique (5/6), and cooperative versatility. Major story involvements include the U.S.J. Incident, where her quick thinking saved Izuku Midoriya and Minoru Mineta in the Flood Zone by strategizing escape and deducing villain plans. During the Sports Festival, she placed thirteenth in the obstacle race and joined the cavalry battle. In the Forest Training Camp arc, she confronted Himiko Toga alongside Ochaco before later regretting her stance on Bakugo’s rescue. Lingering guilt surfaced during the Provisional Hero License Exam. The Shie Hassaikai Raid highlighted her stamina as she endured 20 minutes against a Quirk-draining foe. Her role peaked in the Final War when selected with Ochaco to subdue Toga, showcasing evolved heroism perspectives. Eight years post-war, she graduated U.A. as the No. 34 Pro Hero.