From Sonic Retro
Breezie is a female hedgehog robot which served as a Secret Agent for Dr. Robotnik. She is flirtacious, seductive (for a Hedgehog), and a bit spoiled. She is voiced by Venus Terzo.
In Lovesick Sonic, Sonic falls for her and starts to do several menial tasks for her to win her interest. It is later revealed she is a secret agent for Robotnik and she is doing his bidding. Unfortunately for Robotnik, she develops feelings for Sonic and does not betray Sonic, as she was supposed to.
In a later episode Breezie fell in love with Robotnik Jr., another of Robotnik's creations.
She appears in Hero of the Year along with Robotnik Jr. as one of the invited guests for Sonic's party.