*Her wedding photos and in a flashback during "Ghostf**kers" shows that Millie used to have longer hair, with the same flashback depicting her sporting a ponytail held by a burgundy hair tie.

During said flashback, she appeared to be more slender, and used to wear more Western-style clothing which is that of a burgundy, leather jacket-like crop-top with gold-like cuffs, gold-yellow studs on the popped-collar, and some parts of the upper-section being colored black, two-toned purple jeans with tassels and a burgundy baldric strap around her left thigh, and small black heeled boots with red toes. She still sports her choker and gloves.

In "Ghostf**kers", she had once suffered from insecurity over how she feels like she's seen as a "Wrathian who's only good for their muscle" until she met Blitzo who changed her life for the better.

In "Ghostf**kers," Blitzo commends Millie for her intellect in a flashback and she was able to figure out who the culprit was in the One Star Wonder hotel murders.

It is revealed in "Ghostf**kers" that Millie moved to the Pride Ring after joining I.M.P, and before meeting Blitzo, she used to be a free-lance assassin, who at one time stole a job from Moxxie, which led to Blitzo wanting to hire her.*