just carry herself like a champion either way. If you lose, humble yourself, say you'll regroup and be back just like McGregor. If you win, give your opponent some respect and move on. Rather than reject handshakes, talk smack to a just ko'ed fighter.
Worst thing she can do is lose and retire, what does that teach young girls about adversity? 2nd worst is to win and start taking shots at all these doubters, who are only there because what else are they supposed to think when you're the only champion to walk around hiding your face with a pillow after a loss?