Oh wow, what a creative and fun task to do!
I would be a Greek goddess (because i enjoyed learning about them so much in high school). My name would be Harmonia because I think it is beautiful and connects to music. This brings me to my next point, I would have the power to control music! I believe that music is a universal language between everyone in the world and I would use my power to bring everyone together and make everyone calm and happy. I got my power from listening to music for so long that it just became a part of me, haha.
This is a really fun assignment, something that we should consider teaching and assigning to our students one day! Great job, myth group!