Opposites were made for each other, so it would seem.

A, born deaf, does not know what to do with their ability to [power related to sounds/music].

B, born blind, does not know what to do with their ability to [power related to light/shapes].

And, most of all, they don't even know how this happened. It's on their way to school, for sure, but who really knows?

The only thing they're 100% sure of is that it is not going to be easy to hide these powers. How can you control something you don't even know the nature of?