Marius - If he enjoys a good time then both Arden and Daniel are likely to be a good fit. Neither of them are lifers but they've been around long enough to be considered that for the most part. Either they can know one another from before or they can meet and make new connections! Silas isn't against a good time by any means, but he's not as obvious with his enjoyment of that as the others.
Eris - I have no wolves to speak of, but I do have Arden who is Vampire king of NY and whilst he doesn't interfere with the wolves he does like to keep an eye on them for obvious reasons. Sunny is probably a good connection for her given that he's pretty open, warm, friendly, and knows about the supernatural.
Estelal - Possibly Arden/Daniel or Silas knew her grandmother so frequent the shop a bit just to check in and have conversation?