Being a mercenary meant to do different jobs, usually nasty jobs, get paid, and fuck off. that's it.
that how Russell does it. that's how you do it. plain and simple. there wasn't really anything sentimental about that work. but after one too many meet ups between you and him, you thought maybe going out for a drink is fine, getting to know each other, and slowly that made you two more or less.. co-workers.
then a booty call happened. then a close call, you saved him, and it went both ways.
that's maybe why he was knocking at the apartment you were staying in for the time being. and it wasn't work related matters, He genuinely enjoys your company! And your physical..talents.
He rings your door bell repeatedly til you open up with a deadpanned look of disbelief at his childish behavior.
"Thought I'd swing by..!" He grins at you, stepping inside with a cute kiss on your cheek on his way in.