1) Like I said, I figured it could easily have been something she obtained when she became a Nobody (like Axel's facial tattoos, which disappear when he gets his heart back). If that doesn't work because it's headcanon, I'd like to take just the darkness as a tier 1, and give her the hair instead of the weapon summoning from her monster encounter.

2) No, and I can skip that too- it's just there for humor/to make it harder for her to hide.