Quills and purple parchment

Hermione Granger has spent the last 3 years of her life fighting to restore her parents memories, with her anonymous benefactor Quills helping her every step of the way. Now that she no longer has a goal, what should she do now? How can she ever repay her thanks to Quills if she doesn't even know who they are? And in truth does she want to know who sends her the purple parchment?