The Shell's rapid morphing stopped once, dressing in the Joker's purple jacket, with Alex's face. On it's right hand was a burn in the shape of a pair of lips. Almost like a kiss had been burned into the flesh.
The changes resumed. Whether they knew it or not, the thoughts and ideas floating around in the minds of the inhabitants of the mansion were adversely influencing the end result of Alex-Joker-It's transformation. IF, for even the briefest moment, their thoughts turned towards a thing of malice, a thing of balance, or a thing of benevolence, the change would be over, and a new or familiar persona created.
(OoC: Basically this means it's up to you guys to choose who the Shell will turn into. Alex again, Joker again, or Tyler?)