Earlier in the play, I completed the quest in Vault 81, and met Curie at the end.

I did not have her join me as a companion at the time, and I dont believe I sent her to any of the settlements (I think...).

I'd like her to join me now, but have no clue where she is. She's not at Vault 81.

Any help would be appreciated.

Are you sure she's not at vault 81? Try looking around the area as soon as you pass the vault door (don't go down the elevator) that's where she was for me

I found her! Thanks Danny.

I checked the uninhabited part of Vault 81 (where Curie is found), but didnt check the area where people still live in.

Thought it wouldnt make sense for Curie to be living amongst them, but there she is!!

I actually have a bug, when I send her to one of my settlements she always returns to vault 81. At least I know where to find my french femmebot

Be aware the Curie is bugged for many of us. I can't get her to go to any of my settlements regardless of what I do or how I do it. She always ends up going back to Vault 81 and stands right in front of the doctors office there. I'm really hoping this gets addressed in the next patch.

edit - Razorchain posted it at the same time as me. Consider that the verification of the bug lol

She always went back to where I sent her as a floaty nurse bot but after the transfer she always goes back to Vault 81 for me.

I encountered the issue both before and after completing her companion quest. People have experienced this glitch in a number of ways. Some people were able to send her to settlements before, but not after completing her companion quest. Some people, such as myself, have never been able to send her to a settlement. Other people have had no issues and have her at a settlement now. I wish I was in that last category. Curie is one of my favorite companions and I hate having to to Vault 81 to pick her up.