It doesn't matter if you totally piss her off, she'll remain at the druid grove until you pick her up. I believe the only two companions you can totally screw up getting are Wyll and Gale because
they can die before they get into your party and thus cannot be revived
. I'm not sure if you cannot pick her up because of being a githyanki yourself, but if you're playing in a dual-party I imagine the party member that isn't gith would be able to talk to her at the grove.
