Story based
From Bonfire by Hogswild Prasetto
Story based custom NPCs are usually less common form of player created NPC. While they may service a kink or specific fetish like a Kink based NPC, they generally have a much more fleshed out back story that their creator may add to as more time becomes available.
Non exhaustive list of current NPCs in the Story based category. To download right click the direct link and select "Save Link as..."
To add an NPC to your game once you have its .bab file, check out, Add NPC orcs to game
