Darcy as Tony's assistant
I'm looking first for a fic where Darcy is acting as Tony's assistant of sorts and she has to escort Tony to an event and joking talks of Tony as her dad where a reporter hears and it lands in the news the next morning. I'm pretty sure it was archived on AO3 but I can't find it.
More generally, I'm also interested in any recs where Darcy functions as science herder for Tony. I really like the interplay between Darcy and Tony there. Definitely no Tony/Darcy fics though.