Elin mentioned something about "even Tinkerbelle is retroactively getting a task" , which I think is kinda cool. Because: J.M. Barrie defined her in the book as a pot-mending fairy to start with , something not mentioned in any film depiction of Tink. J.M. Barrie inserted a lot of fairy facts(if you will) in Peter Pan , and giving Tinkerbelle attributes of the old pagan house - sprites reflects that.