Thalia is a new Seelie but no one is going to stop her from helping to get the moon back. Because A) She's the lieutenant to Artemis whose is the Goddess of the moon and that is really the only reason that she needs.

Her ability to do electric shindigs will be halfed but she'll still have all of the other weapons that she carries. Though, she'll probably rely more on her bow and arrow for this one. She'll also be willing to help any one who doesn't quite know how to wield a weapon if they need it.

So long as they don't get in her way of getting the moon because top priority and no one is going to stop her.