[Ever since her parents died, even before that, Elsa hasn't been able to have company during tea or anything she did. It's not without worry and fear that she managed that make the offer, but she understands that there's little way to avoid being with people in the current circumstances. And she wants to give it a try and make sure if she really can't be with others. Luffy promised that he wouldn't let her hurt anyone, that it would be fine and for now she has decided to believe in him.

Her smile grows at the answer before she giggles softly at the question.]

He invited me to join when we talked for the first time through the books, though I obviously refused until he found me and made a convincing case of his argument. I will admit to not be entirely sure, but for now I want to believe in him and as long as no one ends hurt it should be okay.