This character exists primarily within the Sonic X continuity.
Information in this article may not be canonical to the storyline of the games or any other Sonic continuity.
Vivian is a character mentioned in the anime series Sonic X. Based on her name, she is presumably a human female. It would appear as though Jerome Wise has some sort of romantic relationship with her, as he was shown dreaming of her while sleeping and making kissing gestures.
After losing his job as the President's assistant. Jerome seems to be searching for Vivian for unknown reasons.