An Invite To The First Flame

Pinkie's two halves find themselves in Lordran with no memories of how they got there, but the goal to get out.

The Undead Asylum; the place where those afraid of the curse lock up the undead so that they may be forgotten, turn hollow, and hurt no one but themselves. It is a dark, foul place, but only the beginning of the journey for a few chosen undead.

So, why is Pinkie there, and how much will she, or even her other half, be able to take before they break?