Frustrating relative lack of LGBT NPCs in this game

[Mhaeric]

How would an NPC be identified as LGBT? Special color, a big marker hanging over it's head? And what difference would it make when you're interacting with them to pick up or turn in a quest?

The same way any of the multitide of NPCs that are identified as straight is. The obvious way being mentioning something like a wife, boyfriend, girlfriend, etc in passing or actually having that other npc also be in the game. For example, Chai-Nuzz and Dulai-Chai or a female quest npc asking the player to find their husband in the forest because he hasn't come home yet and she's worried. All that's needed is for the gender of the pairs be the same and voila.