Thread:NoWayThisUsernameIsAlreadyOwnedBySomeone/@comment-27021716-20150926212007/@comment-26561761-20150928155012

Ah yes, those descriptions don't help at all most of the time. That is the Obedience stat, the amount of stars you have there depends on how many items increasing that stat as well as your level.

You on level 44 require 310 points to get 5 stars there, she on level 17 requires 110. Before you even ask, no, you cannot see those numbers in-game.

If she played during the Monorail 2015 Event she has access to a lot of items that helps there: the Monorail Station, the Project Board, and every single track piece she has gives 10 points to the Obedience stat meeting those requirements much easier than the normal.