Rouge the Bat is a universally famous treasure hunter. Her voluptuous and daring attitude turns any man's head.
Her policy though is that duty comes first, but she has a big interest in jewels. Her figure, speech and behavior masks her true identity.
Rouge actually has a crush on Knuckles the Echidna, but refuses to admit it (possibly considering their arch-rivalry over their respective treasure). Rouge the Bat is very secretive about everything and very little has actually ever been disclosed about her.
She would often switch sides with either the good or bad to confuse them.