Sweetie Belle based on the My Little Pony: Friendship is Magic TV series. This story takes place during season 8. The season acts as a backdrop or is notably changed throughout the chapters.

There is no song for this set of chapters but if I keep doing more projects to cover the entire story, she does sing in a much later chapter (Chapter 68 - The Show), which would be in a much later project.

Sweetie Belle is the CMC most interested in mevs when she finds out about them from her sister, Rarity. She and Rainbow Dash bond when the filly shows interest in watching an actual exchange. Though denied, Rainbow offers to show off her full vampire form and introduce her leviathan dread, Blitz. Sweetie happily accepts.

She is also happy to be the pony in the know among her friends about anything mev-related.

While it is not covered in this arc, I do want any actors interested in this role to know that Sweetie Belle has a very large role in this story. In the next arc, she will offer to become Rainbow Dash's assistant, and Rainbow Dash will accept. She has an entire chapter dedicated to that event in Chapter 28 - Rhezenda Sweetie Belle (which is one of the longest chapters in the story, along with its follow up chapter immediately after, Chapter 29 - Learning More).

Chapter Appearances with dialogue:
Chapter 14 - Revelations Continue
Chapter 15 - Marked Filly Curiosity
Chapter 18 - Appealing Danger

Sample Dialogue from the actual My Little Pony: Friendship is Magic TV show: https://www.youtube.com/watch?v=UqpTAVT5cBE

Context and italicized audition lines:

0 - [Context: Scootaloo is defensively insisting that she never said she wasn't a fan of the Washouts. Sweetie Belle is pointing out the clubhouse still has a lot of Washouts decor and almost no Rainbow Dash .]

"I think the clubhouse decor speaks for itself," Sweetie Belle pointed out.

1 - [Context: Sweetie Belle is the Crusader most into mevs, so she's actually interested when Scootaloo admits to Rainbow Dash showing off her fangs.]

"That is so cool," Sweetie Belle said with evident fascination. "I didn't even think to ask Rarity if I could see her fangs."

2 - [Context: Sweetie Belle knows a few things about vampire stories so takes a proper guess that the mevs bite each other to exchange magic.]

"Rarity mentioned the exchange too though I didn't know it was once a week," Sweetie Belle added. "But if they're vampires, even if they are different than most stories, I'm pretty sure they bite each other. We know Rainbow's got fangs. I bet Applejack and Rarity do too."