User is made up of or can transform their body completely into sound. Users' transformed form is either anatomically identical to their normal form, aside of being made of sound, in which case it contains all to organs and is somewhat vulnerable to attacks. Alternately the user can transform into homogenous matter, without any part of their form being more important than the other. In effect, the user can act as a living sonic boom; by simply moving at a fast-enough speed, they can disorient opponents, shatter windows and more.