"There's no need to figure it out right away. I can wait a day or two." Not that Luna would be idle during that time but she can certainly get by without going to the library for a couple of days. Her duty is to look after Usagi so she could spend some time learning about the girl's business and offer any help in that area. It's clear that Usagi has missed her a great deal and it wouldn't do either of them any good for Luna to stick her nose in a book immediately after arriving. "You could always change the color of the ribbon every time I recieve a new crystal." As long as the color wasn't absolutely terrible, the Mauian didn't have a preference.

While she can see the Senshi taking in a young child, Luna is not impressed with the part where this Mabel-chan is reeeallly fond of glitter. "Please let her know I don't want to be cleaning glitter out of my fur."

Her ears turn to the sides as she listened to Usagi ramble on about the dog, obviously trying to sell the idea to her. "Calm down, Usagi. It's fine for you to have a dog. Just so long as there's nothing for me to worry about." She simply doesn't want to be a chewtoy or a snack, that's all.