Since this most likely won't be revealed any time soon, I'm making a discussion thread regarding the recently introduced middle-school girl's identity, motives, role in the plot... etc. Anyone who has any speculations about this character can post their comments here.
Spoilers should be covered with spoiler tags of course.
NOTE: Since Conan assumes that this character is female, I used the pronouns "she", "her" for convenience (instead of "they", "them", "he/she", "him/her"....), however she may very well be a male in disguise.
P/S: If anyone wants to add another specific option to the poll above, you can tell me or another moderator.