EDIT: Does it with more than just Pallegina.
I seem to hard-crash whenever I switch Pallegina to my party while on the open sea; I'm unsure if the problem persists when going to port or if doing it in an inn, but I will try and get back (when I'm able to edit this post..)
I added a DxDiag and the crash report folders in a .zip, as well as a wetransfer link (see below.)
To mods: Sorry for the double-post, but I can't edit my post because it's waiting for moderator approval.
https://wetransfer.com/downloads/20718b3b5a3b17588409da4e9bc576fd20180512040708/090240e64041e3ba09cca386a172a50720180512040708/489f10
More Information...
After playing around a little bit, it seems to crash when I do these actions in this order:
1) Load game.
2) Dismiss a character from my party.
3) Add a new character to my party.
4) Play around with their inventory.
5) Dismiss them and try to add another character to my party.
Pillars Bug.zip
DxDiag.txt