I agree with this^^. While there are signs of possible feelings towards Sasha, when Rebecca talks to the dragon guy (I'm bad with names, what can I say), she recounts the feelings of helplessness she felt towards the prince with no hint of a flashback towards similar feelings being felt for Sasha.
While this could be argued to be because she simply will not allow herself to recognize the possibility that she holds feelings for Sasha, there is very little to support that and is most likely Rebecca feeling love towards Sasha in a purely platonic way(to a much larger extent than is seen in everyday relationships however, as she feels so indebted and thankful towards Sasha).
Overall, I really like the way their relationship progressed and how nothing is forced or fetishized. Regardless of whether or not Rebecca holds romantic feelings towards Sasha or the potential for romantic feelings, their current relationship is really great and I love the friendship that exists between the two.
I know a lot of people are upset that Rebecca and Sasha aren't romantically involved, and I get it. However, I LOVE to see two women who love and support each other in a healthy, platonic way. I feel like a romance plot is often forced on a lot of otherwise beautiful friendships. Friendships can be just as important as romantic relationships, let's not forget that.