Sally Acorn the chipmunk, she was supposed to be in two games but they were never released. She has a smart mind, and can easily make a great sidekick.
If I know Sega, they won't... they just add a stupid character that will never come back in a new game. Cause Sega logic
Anyone who hates chocolate must have a mental disorder or is lactose intolerant
"She has a smart mind, and can easily make a great sidekick. "
I sincerely doubt Sega is capable of making any Sonic character interesting or otherwise worth caring about.