derek's a total tease, all of that adding up to how charismatic he is. he's a loverboy at heart, despite all that macho tough man stuff, he's a sweetheart, really. he's been through a lot so that hard shell is present but it's not that hard to crack it.

he's aggressive, firm and stern when he has to be when it comes to his job—it's obvious that he has disdain for the types of criminals that he works with. even if he's suave as hell.

so when he breaks your stoic walls, he teases you a lot.