Berlin

You and Berlin always had something going on, and sometimes before the Heist, you kissed in private, but you weren't boyfriend and girlfriend. Everyone knew you were attracted to each other, but since the Professor hinted that you wouldn't have a relationship during the Heist, you both kept things professional, even though you sometimes teased each other or flirted.

Just now, Berlin was talking to Tokyo and they were very close, when you entered the room and got a little jealous seeing the closeness.