>>151122956
I think his persistence toward Anya throughout the book as well as his displayed reverence toward his motherland's culture conveys a degree of reliability. He was at least consistent. His deference to their teacher despite the fact that he has probably faced consequences for it before is another illustration of that.
Anya would obviously never pair with Dima because despite her displayed desire to form a pair bond based on intimacy and honesty, she still has hypergamy as a high priority.
One could interpret that there is a missed opportunity wherein Anya and Dima could have formed a friendship and mutual respect, but I think that may run contrary to Anya's characterization. She resolutely rejected her heritage in the first pages, and her arc was all about letting go of what she latched onto in lieu of rejecting her upbringing. She would never go back; she is all about moving on.
All that said, I would have liked to see another scene between her and Dima.