I was thinking of replacing Lavinia with a lilitu in "Into the Maw". My reasoning is that Malcanthet might want to have a little extra control over the PCs in her attempts to demolish Demogorgon rather than let the PCs have free reign to do as they wish. My other option is to replace Lavinia with Lynnara (and get rid of her from area 24.).
In this scenario Lavinia has been secreted away by Malcanthet to be used as a bargaining chip should the PCs decide to do something against Malcanthet's wishes (such as release Shami in "Wells of Darkness"). I'm just not sure what should happen to Lavinia. I'm thinking of having Malcanthet release her when Demogorgon is disposed of.
My other option is to have Lavinia transformed into a lemorina half-fiend and have her stand by the side of her dead brother against the PCs. This would be truly horrifying for the PCs who have built up a rapport with her. Of course, this also should not mean that Lavinia needs to be destroyed. Perhaps the process can be reversed (by traveling to the flesh forges or with a wish spell).
Opinions?
I think it would depend on the relationship the PC's have developed with Lavinia. If they have strong ties to her I wouldnt do it. How ever if you wanted to screw them over and they dont really care for her all that much...then by all means you should royally mess with them.
This is what I am planning, to royally mess with them. My PCs have already killed off poor old Lavinia and joined with Rowyn. They think they have their bases covered, but they don't. Lavinia will be making a comeback sometime in this adventure, and I think the Abyss is a wonderful place to make this happen.
hehehehehe