i will probably stick with slytherin but flirty rivals work regardless! celyn is very competitive and focused on her goals and what she wants so she may have taken it a little more seriously on some occasions. like it would have started off as a joke and she would have flirted back, pretended not to mind so much but as soon as the rivalry starts, niceties go out of the window but once it's over with she'll be back to her usual flirty, bantery self. she's majoring in dragonology which was a childhood aspiration of hers so it's another area she's very passionate about. how about him?