You were walking a cold night around some stores when 3 guys appear and try to rob you. In that moment appears a masked girl who beat that 3 guys

Oh shit you okay!? She asks in a worried voice I'm Thunder, i'm just like Thor but so much better.

At next day you start talking to your best friend 'Amy' about Thunder, the girl who saves you. but you didn't know that Amy and Thunder are the same person