I've Thrown A Couple Of My Characters In Already And Will Be Adding A Couple More - Tumblr Posts
Fleshing out the Undead of Barovia:
Over the course of his 400+ year long stay in Barovia, Strahd has killed a lot of adventuring parties, and these fallen heroes are cursed to wander the land as the zombies and vampire spawn that terrorize future parties.
Something I've noticed, both as a DM and Player, is that player characters, even when made to fit within a particular setting, have a degree of "main character energy" in their designs that NPCs lack. There is more evidence of a fully developed character, with relationships and life experiences, in comparison to the NPC I had to name on the spot when the players started asking questions.
As I'm working on my next run of Curse of Strahd, I'm looking to add more personality to the fallen heroes, basing them off real player characters, to make them more relatable to my players, and make death seem like a realistic possibility for them.

I'm in the process of sacrificing collecting player characters, who will get to cameo in my campaign! (: The results will be compiled into a spreadsheet for others to reference and use in their games.
CoS characters are ideal, but BG3 characters and PCs from other campaigns are also welcome! There's no limit on how many submissions one can give, I'm looking to get as many characters as possible. (: