I'm thinking of having a character in a setting where she's the most ridiculous OP in it. However, her power will be something people consider weak or silly such as cotton manipulation. Her power is machine washable as well. XD

Maybe she nonchalantly strangles the Satan stand in to death with a string of cotton and absorbs all fire damage with a cotton barrier. She'd probably have to be able to generate additional cotton to be super OP though.