If you were born into the My Hero Academia universe and were not one of the unfortunates born Quirkless, what would your Quirk be?
What would it be capable of? What would it's strengths be? What would the drawbacks of it's use and weaknesses be? What would it be called?
Are there settings where it would be more effective than others? For example, a sound ability would be pretty useless in Space.
Design a Quirk!