[quote=RainDash]
How is she going to survive? Do you plan on having her hide or be forced to fight to survive? We will be encountering monsters one the journey, so she might have to fight. Pacifism doesn't work for a demigod, considering that they have to fight monsters all day every day on their own. Plus, it might get kinda boring sitting back and watching.
[/quote]

Well, that's kinda why it's a fatal flaw. Plus, she does have that healing stuff - that she can heal others and her own injuries heal at an accelerated rate. Besides, her role is a healer, not a fighter, and it's best that a healer doesn't get in the way of combat.
And they don't fight monsters all day every day on their own even in the series. Some go the entire school year without ever encountering monsters between camp sessions and it's indicated in the series that it's possible that a demi-god may never get attacked by monsters if they go unclaimed (and before you say it, she wasn't claimed until she got to camp) and some can go years without attack even if claimed. 
I RP a pacifist in a LARP that is high combat - it's not boring if your mindset is for it, and in an RP I have never had a problem with such a thing. If you're insistent that I have a character that fights, then I'll have to come up with a different character rather than butcher her for the sake of making a combative character. I haven't had a problem with her in any other CHB RP I have used her in even going out on a quest with her (yes with tons of monsters.)