OK I dabbled in the idea of a nightmare before Christmas today.
And I loved drawing this shit it was frickin fun!

Nightingale is the opposite reality to their universe. Steamer is basically the guardian of that realm.

In this realm everyone are Dylats(die-late-s) Everyone else has a doppelganger but Steamer actually is a Dylat as she had to trade her human form to be able to get her fiance's soul.
Regardless placing his soul bonded into her mechanical arms