Frog

Tsuyu Asui carries Frog, a Mutant Quirk whose range is listed simply as variable. It appears in Chapter 6 and in Episode 5 of the anime. Rather than one trick, the Quirk bundles every amphibian trait together, and Tsuyu can run them without any apparent limit and in any combination she likes. Species boundaries do not seem to apply either; if a frog somewhere can do it, so can she.

The list runs long. Her anatomy is frog-built, her legs are powerful, she clings to surfaces, her tongue extends on demand, she can recolor herself to blend in, she swims fast, she controls what her stomach brings back up, and she secretes mucus with effects ranging from paralysis to scent masking.

Her tongue reaches twenty meters fully extended and pulls hard enough to lift a person and fling them a fair distance, or to be cracked like a whip. Her grip handles walls and even tightropes. Her stomach inflates, releasing an irritant held in its lining, and it doubles as storage for whatever she swallows and later brings back up. The mucus along her arms carries a distinctive smell that throws off anyone tracking by scent, and enough contact with it will paralyze. Camouflage came later, unlocked through training.

Temperature is the weak point. Frogs are cold-blooded and so is she, so a long chill locks the Quirk out and leaves her sluggish and heavy-lidded. A sudden one is worse, dropping her into something close to hibernation until she warms back up, helpless in the meantime. Heat and fire cut the other way, threatening an aquatic body with drying out.

Tsuyu Asui, the hero Froppy, is the only known holder, though her family's frog-like looks make it a fair guess that they share it. She earned her range the hard way, working every muscle she has, tongue included, by climbing a cliff face while that tongue stayed anchored at the top.

Water is where she dominates. She moves through it without surrendering strength or agility, fights and pulls victims out of it, and holds up fine in saltwater despite frogs being freshwater animals. On land she leaps high, sticks to walls, and crawls along vertical surfaces. She walks like anyone else but has never once been shown running, hopping on all fours instead.

Her named techniques are Camouflage, which shifts her coloring to match the background and sets up ambushes, though anyone watching closely can still pick her out, and Meteor Fafrotskies, a joint move with Uravity that pairs Frog and Zero Gravity to lift debris and hurl it at enemies. The premise draws heavily on the X-Men villain Toad, with a nod to Spider-Man's do-whatever-the-animal-can conceit, and the Quirk sits close to Chameleon and Tree Frog.