Once Upon a Time's Emilie De Ravin left the series after season 6, so her character, Belle, has little to do with the final season. The ABC series, which ran for seven seasons in total, followed the revamped stories of various popular Disney fairytales, and De Ravin's Belle was a spin on the classic character from Beauty and the Beast. Though she was a constant presence throughout most of the series, she only made a guest appearance in Once Upon a Time season 7—and the same was true for most of the original cast.
https://screenrant.com/emilie-de-ravin-belle-once-upon-time-exit-explained/
