Just finished my second read-through, and this time it was easier to ‘hear’ it in Tanya’s voice. Although I noticed that it didn’t change my opinion about Tanya’s character as much as CAECO did for Caeco. In that book we saw Caeco’s character developing, especially through her interactions with her team. In Darkkin Queen Tanya’s less likable characteristics (jealousy and competitiveness) are still there, although the jealousy seems to be tapering off.
Another thing that has been hinted at that we haven’t seen yet is Tanya becoming a spiritual leader for the vampires, showing them that their souls are not lost. That’s likely coming up soon, following the scene with Galina in the chapel. Hopefully that change will affect her, allowing her to shed the more unattractive aspects of her character.