Art by  zippers Original http://www.furaffinity.net/view/13719123/
Symphony belongs to  Zili

Mezzo is the accompanying character to Symphony. She is a blind rat who was paired with Symphony for voluntary genetic experimentation. As a result she has rapid healing ability.

She is rather shy but very kindhearted and willing to place herself in harm's way to help others. (Based on the story about how rats will rescue other rats in tight spaces and even leave food out for them.)