Fluttershy's cottage is one of the few homes in Ponyville that isn't decked out for Nightmare Night. Twilight hopes that's an encouraging sign for Princess Luna, an indicator that her would-be helper doesn't buy into all this 'Nightmare Moon' nonsense.
"Don't worry, Princess," she says as she leads Luna up the path. "Fluttershy can give you some great pointers. She's delicate and demure, with the sweetest little voice."
Twilight steps up to the door and knocks three times with her forehoof.
- My Fair Luna