Mireille likes shiny things. This may be the result of having been built by a demigod whose family originated the hoard of the Nibelungen; Weyland used to give her a lot of jewelry, and that made her happy.

(She may or may not have pocketed some shiny things that didn't exactly belong to her, over the years. They don't have to be worth anything, they just have to be shiny and pretty. Mechanical magpie, this one.)