Happy Tuesday, Darcie! I'm glad you think it makes sense that Buffy could be bi. It felt a little forced to me in the comics but I think that's just the writing. What was very awkward for me was the suggestion that Willow was sexually interested in Buffy. Weird, right?
Also, just a refresher: in 5x01 "Buffy vs. Dracula", Dracula did turn into a bat, fog and a wolf at different points in the episode.