Quirk: Spring
Quirk Type: Mutant
Quirk Class: Metal and Body Morph
Ability - The user's wrists and ankles aren't connected. Instead they are joined by a thin metal spring. This makes the user walk funny as when the spring is fully coiled, it will use all of its energy to spring back up. This allows the user to power up kicks and punch others at a distance as well as the ability to jump incredibly high and reach incredibly far. The users hands will be a pain to use as the spring will be slacked most of the time.
Combat Range: Close and Long
Disadvantage/s: - Simple activities are a struggle as the springs bounce when recoil and often remain slacked.
Special Moves: None
Hero/Villain Name ideas: Springlock, Scrapper, Reband
My Input (not necessary): A quirk that allows massive acrobatic ability of movement like Tsuyu.

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Future Quirk Concepts (2)
FanfictionSecond book on this topic. Just some ideas that can be infused with the would of My Hero Academia. No need to credit as a lot of ideas are no longer original.