(You better get a move on! I check my notifications all day long until I see yours post, I'm so addicted - you are going to have me searching for Teddy/Scorpius fics now!)
I want to try and show that Yassen is human, even if he is an assassin. He was a good kid once, just had bad things happen to him that turned him cold. He doesn't want to see Alex end up that way (and I'm sure Alex will have a positive affect on Yassen too ;-)