I hope I'm not contributing to much to the shy and soft-spoken problem. I wanted to make a character that was a product of being weak in a society that expected a lot of dominance. Elna doesn't talk to people because she's bitter that their lives turned out better then hers and she doesn't speak out because she is paranoid that everything is a test complete with punishments for failure. I felt that in a society based on celebrating the strong should really ware down on the weak both mentally and socially. Thus you get some introverted Inarta, at least in the lower castes.
I'd also like to say that I've had the good fortune of Rping with Raif in my first thread. He plays really well to that whole jerk Endal persona you were talking about. I need characters to be a jerk to Elna sometimes so she can feel validated in her world view.
Oh and another thing, if you want less sexual abuse towards the Dek, I'd suggest changing this quote in the wiki.
By and large the vast majority of 'youth' come from the ranks of drudges and commoners. Most are byproducts of liaisons (either wanted or unwanted) from riders and artisans taking advantage of fair looking drudge women.
This is where they are getting it from, it's implying that a large number, maybe even the majority of Inartans are born from a high caste member having sex with the best looking among the Dek. Its spelled out as highly common so I'd change that if you want to see less of it reflected in the PCs