Nia and Jory. Evvy is annoying, Pasco is not very bright, and Keth is just there. Nia and Jory are clever and they kind of have an unfair advantage because they have very different personalities so you can just pick the one you like.
Evvy. She's got street smarts, an empathetic, realistic personality, the ability to tear down houses, and she can magick rocks to make them really pretty and shiny.
She also likes cats.
There's no contest for me here.
(I think it helped that I felt personally invested in things working out for her, and that she and Briar made a pretty good pair in terms of working with each other and apart. I also liked the close relationship they formed.)
Love for Keth. Evvy is cool, and I love Nia, but Jory annoys me. I just want to smack Pasco. Keth makes more sense to me than any of the others, maybe because he's just more mature. I liked his background story best. Plus he can handle Tris. That series in general terrifies me.