Yes but that’s exactly what I mean. He is often portrayed as confused, isolated, bitter or melancholic rather than cold. I think Bateson has such a fantastic understanding of the character and what makes him tick.
He talks about 47’s humanity in a lot of interviews, this one with White for example: https://thingsfromwhitesmind.wordpress.com/2017/05/10/hunter-and-hunted-an-interview-with-david-bateson/
Bateson: “It’s clear Agent 47 has a very purely defined moral code. He is programmed to fulfil a contract. That contract involves the taking of life. There is no doubt or repentance of what he does. It is as if he is either autistic or psychotic in that he is completely detached from his feelings. And yet…. he is not. It would be utterly boring and uninteresting to play him 100% like that. There is something in the cocktail of his genetic make-up that lingers. He is a human, after all.
“Agent 47 may never find the answers as to who he is and what makes him the way he is. But it’s the subconscious search that makes the journey interesting. There is nothing new here. It’s life. But part of the appeal of the character of Agent 47 is that just ever so slightly, we are haunted by him."
None of that suggests being cold and detached to me. His relationship with Ort-Meyer was a complex one at best, and the neck snap was a personal death. His reaction to Lei Ling was a great way to show his utter confusion and/or repulsion to sex – he didn’t just stand there, unaffected, we see him visibly shudder. Then when he remembers it in Contracts, he is visibly confused.
We see that a lot of 47’s detachment in C47 comes from a complete lack of understanding. Then when he does gain understanding of who he is and what he is, he retires and goes to live with a priest for two years! That is not something a cold, emotionless robot would do. That’s why I never understand when people say that.
He develops a connection with Vittorio and his sole reason for picking up his guns again is to save his life.
By Blood Money, we see him bitter and angry by his isolation. We get the famous line “names are for friends, so I don’t need one” – well of course, after Silent Assassin he knows he can’t have any friends, he can’t have a chance at doing anything else in life other than what he was designed to do. He is utterly ruthless in Blood Money and also reckless, he lacks all sense of self-preservation. That explains his utterly hopeless and melancholic speech at the end of Contracts too, which takes place in the Blood Money timeline.
Then by Absolution, he has begun to warm to people again. He cares about Diana again, and sees his own plight in Victoria. That story was terribly executed, but 47’s own motivations made sense in the context of other games, especially in light of his thoughts on redemption in Silent Assassin and his feelings of being trapped by his life.
In H6, we haven’t seen much character development at all because the story has not focused on 47 yet. It’s obvious 47 doesn’t care about his targets (“a contract is a contract”/“I can do anything I’m paid to do”) but that doesn’t mean he is cold or emotionless or he would be a boring character.