Welcome! I am Tori, and I am half of the mod team here at Mercy Cove.
I've clearly got a bit of a problem, as I have a bit of a collection of characters, all of which can be read about here
A few that jump out as being potential connections for Jiang are:
Allie (allie_j) - Seeing his fondness for food, Allie is the current head baker at the bakery, Bake My Day. So I imagine, that there is a good chance they will run into each other sooner or later.
Mal (bookworm_) - I see your guy enjoys it read, and as it happens Mal is the proprietor of the main bookshop in the Mercy Cove area (there is also a small coffee shop with a few pastries on-premise, so that might appeal to him).
Mandy (feisty_) - Mandy is a server at the diner, Speedy's diner, so if Diner food is his type of thing, then there is that. She is also a barely-scraping-by single Mom of a 10-year-old boy, so I figure that there is also a very strong chance she has sold her blood at some point to help make rent etc. I'm cool with playing it either way on whether she necessarily knows he is a recipient if that is something you want (perhaps she goes to a clinic, he gets a blood bag delivered?)
Sebastian (strigele) - Seb is the Emissary to the House of Vasiliev, so I can see the pair of them coming into contact with each other professionally, perhaps maybe something closer to friendship if you'd like that?
If I have missed anyone from my list that you would like connections to, or you have any questions about the game, please do not hesitate to reach out to me on discord, my contact is Tori#3639