|This character exists primarily or exclusively within the Sonic Underground continuity.|
Information in this article may not be canonical to the storyline of the games or any other Sonic continuity.
She plays the violin and performed with the Sonic Underground. In the end, she gave up her thief ways and the Duke of Velcomia helped find her a home. She can be seen in the episode "Underground Masquerade".
- Her name may be a reference to the musical term "allegro", which means "fast-paced".