The Musician Prodigy Mǎ

One dimension, two dimensions, three dimensions, seven. You are a child genius who theorized how to access the seventh dimension. In your spare time you compose piano music in the truck-driving country genre. Even though you're smart, you're still a kid and enjoy movies about basilisks and rugby. You do part time work for The Followers of the Singularity because they offered you a near unlimited supply of chicken sandwiches.