I'm going to open my mouth here, where maybe I should've kept it shut. But let's go...
Waiting sensitivity from a brute sounds delusional IMO.
But I think author is building character development there. They showed us someone ruthless, cruel and obstinated. Hoping for Amen to reconnect to his feelings out of the blue just because he got sight of MC is expecting sh** from the author.
They gave us a dude that had work ethics when needed, and even tho he felt attraction towards Evyths he fought to maintain his distance and just try to help her without wanting anythong from her.
And as IRL: first infatuation, then obsession, then feelings after some reflection time for brooding characters. Amen is no saint. I think the story's going great.
People are focusing so much on the violence and forgetting the whole context they've given us prior to it. I'm not really trying to say Amen is innocent here.
But he's conflicted by feeling what he feels for Evyths and his instincts screaming at him that she's a shesmu. He has his reasons to hate shesmu.
At least two times Eva got to ask what he wanted from her for helping her like he did, and he didn't ask for anything.
Part of his job is hunt, torture, get confessions and killing shesmu. Before the torture it literally says he didn't enjoy any of it, but it had to be done.
In a world where if he becomes soft, he becomes prey, that cruelty is to be expected from Amen.
Amen is grey. He's good with whom he deem deserving. But he's a brooding character, he's not on good terms with his feelings. He will deny having feelings for long before letting it go. The first crack in his resolve we saw is when he tried to console Evyths after the friend's death. Then recognizing Eva at the ibu drew the line for him that he couldn't and he shouldn't pursue her. It brought the conflict of his feelings to the surface. When denied of his feelings, what is left is primal: hate, lust, ...
Then we see Amen's subconsciously obsessively lusting for Eva because while awake he knows he can't. Add to it the fact that (only if you're pursuing his route) Eva goes to him trying to be together.
Or more precisely while he hates shesmu, he sees Eva as innocent and she shouldn't think that life brings no consequences. That's why he needs that she watch what could/will happen to a shesmu when caught. He's in hopes that she leave that kind of life or distance herself from him. Because deep down he knows he's too obsessed to be able to let her go.
To this season's arch I believe we'll have Eva really trying to leave Amen while trying to scape her mentor's treachery. The author may develop the characters a bit more, either bringing them together or having redemption or justification for the things that happened how they did.
I don't thing Amen's route is going to be as smooth as Dracula's on the other book.
And just to finish this: how many of you guy were really loving the friendship with Dia? The girl caused problema all the time. It wasn't fun. if I had the option I'd turn her in myself, she was annoying. Like that Kiddo character from Psi(I don't like her, but that's on me).