Oh of course!
I was thinking it could be because someone kept prying at her, not exactly sure who yet, but they kept trying to dig into her past and secrets and such. Like I said, if you wanted, a scar or something she refuses to let anyone touch/see or even speak about. It could be some trauma that happened with her dad, or smth else. Like a death of a dear friend or sibling that she blamed herself, and the scar reminds her of it. Otherwise, for the fight, if you don’t do that, it could be that she’s drifting away. I feel like maybe it would be best if it was either Baby, Abby, or Jinu who is in the fight. Maybe all three, even. I feel like maybe Mystery and Romance would be on Marra’s side.
Anyways, if you need anymore ideas or details, I can always come up with more!