There's not a single thing that'll make you crack. You're like Hotch, but like.. a million times worse in terms of stoicism. You're stone cold, a trait that everyone in the BAU so obviously admires but also wonder what you're like beneath the big bad exterior. You're amazing at your job, everyone knows it, they wouldn't trade you for the damn world. They're just.. incredibly curious, and who wouldn't be?

Derek likes a challenge. He really does. He likes when things come easy but that rush of beating a challenge gets him going like no other. And you? You're very much a challenge. Tough, stoic, no nonsense. Everyone else would be deterred from the amount od times you'd just straight up ignored Derek's existence in favour of getting something done. But not him, no, no, no. He's determined, very much so.

And thank god for it—he's doing a great job at cracking that tough exterior of yours. No one else has been able to do it but him and he's incredibly proud of himself for that fact. Derek's your soft spot and he knows it, he's got you wrapped around his damn finger real tight, and he ain't letting you go any time soon.

"You think you're so slick, baby," Derek muses, seeing the way you try not to crzck a smile at a comment he'd made. The whole team were sent out to a police department in another state, and he'd been making it his goal to get you to actually laugh properly for once. He did challenges like these if he got bored, or made bets with Reid on whether he could.

He nearly always won.

"Mhm, you're one amazin' joke away from burstin' out into laughter, I can see it," Derek knows you better than anyone, better than anyone else ever will. You don't know how he managed to worm his way into your heart but he's not leaving any time soon either.