My superpower in real life is my willpower, I have the ability to remain stead fast under any pressure or influence.
If I could have a "Comic Book" superpower it would be the ability to focus my willpower externally to guard others I care about like a lucky charm or a personal shield who might need a helping hand. The ultimate body guard I guess
Given time I can think through and beat anything, that would just guaranty me the time I needed to save someone. also it would allow people the chance to try on their own, but still allow me to be there if they needed a wall to put their back against.