The problem I’d have with Gina Carano is that she’s getting a bit over-familiar having done the hench-woman routine in the Fast And Furious franchise and Deadpool. If they do include such a character then I’d much rather the performer be a discovery in order to help give the film a more unique flavour.
As for not not appearing psychically intimidating, that was something I’d want to play on. I quite like the idea her appearing harmless and lulling people into a false sense of security before unleashing her skills to down everyone in the room.