A thing. Elia just wants to sit on an empty (or not empty, maybe; she doesn't squick easy) table down in the morgue and watch the bizarre flirting happening. Good luck, Helena. You might have just gained a bestie.
Oh, I wouldn't worry about it going too far! Marcus knows how to reign her in when she starts to have too much fun. And it would be just that for her – harmless fun. I think Elia will tend the slightest bit toward madness (I see her as a sort of Harley Quinn to Dragon's Batman.) which will mean that lots of things seem like fun for her. Whatever's entertaining in the moment.