[@Flamelord] It seems at first glance that her combat personality is when she suddenly becomes sensible and not crazy, but it's actually not. After every battle, she declares to the high queen that her treatment of humanity is unacceptable blah blah card games blah, and that she's leaving. 

But after a week or two of being gone, her non-combat personality takes over and she always comes back, and both her personalities always forget. The High Queen puts up with her once-a-battle temper tantrum because, well, she's a person who, even if she can't beat them, can trade blows with faction leaders.

However, for this idea, I suppose I should ask the GMs if Eos actually WOULD put up with that.