Adrienne was a hypothetical woman invented by Captain Jean-Luc Picard in 2368, in order to make Berlinghoff Rasmussen understand that every choice makes it possible to manipulate the future.
According to Picard, deciding whether to take Adrienne or Suzanne to the spring dance was one of the possible choices that could have major repercussions for the future. (TNG: "A Matter Of Time")
This character was only mentioned in dialogue.
Adrienne had originally been named "Marie" in the script.