Who were Lily's Hogwarts friends?

[ghinghapuss]

No: HPFGUIDX 76586

I'm throwing around ideas I've had in my head for a while about Lily 
Evans' friends.  

We know, or hope at least, that Lily's story, whatever that may be, 
is coming in books 6 and 7. And as we've found out a lot of 
information about James through his friends and enemies what about 
Lily's? 

Lily had to have had girl friends in school and most likely one 
particular girlfriend. I'm sure all of you other female fans out 
there, like me, know just how close school age girlfriends can be. 

What do you think of any of the names we've heard so far?  We haven't 
heard many, but there is Emmaline Vance and Dorcas Meadows who is 
unfortunatly deceased, could they hold ties to Lily?  Or I've 
wondered about the Black sisters, who had to have been at Hogwarts 
too, and in particularly Narcissa, who seems to me the youngest and 
most likely the same age. I have a crazy idea that Narcissa could 
have been Lily's best friend in school and is a keeper of Lily's 
story. 
I would love to know what you all think?
Mandy, an obsessed Lily fan.