[imager]http://users.gmpexpress.net/adkohler/game/Davreya_120.jpg[/imager]
Let's see...how would Davreya know the other characters?
Since Peja has traveled quite a bit, and Davreya is always hungry for information, I figure that he's probably bought the dwarf quite a few drinks over the last couple of years, always searching for useful tidbits. "So you've been in the east, eh Peja? Any news of the Baron's son?" If Peja is active as a merchant, then there's a good chance that Davreya has brought books from him at one point or another, or sold things to him in order the finance the purchase of other books. Davreya tends to donate all of the books that he finds or recovers to the main temple of Jasamai. Perhaps Peja respects his piousness (in reality, Davreya just thinks its the safest place to keep the books) or perhaps Peja thinks that giving the books away is (why give 'em away when you could make some serious gold by selling them?).
Davreya probably would have called upon Ari whenever he needed help translating some piece of Draconic text (even though Davreya can read Draconic, Ari has a natural talent for it that he just can't match). "Ariornvuraurix! Excellent to see you again. Say, would you mind taking a look at this for me?" He prides himself on being able to correctly remember and pronouce her name. He's always very polite to her, mostly because he's wary of her rumored powers over luck and fate. It's a kind of magic Davreya is not at all skilled with, and like most intellectuals he tends to be nervous in the presence of that which he doesn't understand.
Garrel and Davreya might have worked together clearing out the mountain passes. "You head to the front line, Garrel, and I'll support you from back here." For his part, Davreya would have been mostly interested in finding ancient cave paintings rumored to be in the area; he would have sought out Garrel as being the person most likely to know the area well. Davreya respects Enaul and admires Garrel's dedication to that deity, and he also has a high opinion of Garrel's remarkable combat prowess.
Because of Doorgath's distrust of arcane magic, he and Davreya don't get along very well. Davreya probably met Doorgath through Peja, and he's taken it upon himself to 'cure' the dwarf's hatred of all things arcane. "Oh, come on, Doorgath. It's just a harmless little cantrip!" I would assume that Doorgath probably finds Davreya to be very, very annoying. Surprisingly, Davreya gets along quite well with Reisha, despite usually being clueless around animals.
And finally, Davreya most likely would have met Kull while travelling. Given how dangerous the wilds can be, Kull probably ended up saving Davreya's life at some point. "Thank you for the help, stranger--though I'm sure I could have handled it myself." Davreya is very sypathetic to Kull's situation (after all, Davreya also lacks a place where he feels he truly belongs) and would have done as much as possible to help the half-orc out: introducing him to contacts within the Western Alliance, helping him find work as a mercenary, and lending him funds if needed. Davreya is impressed by Kull's strength, but believes that Kull should do more to improve his mind as well.