Is Luna Lovegood a transfigured McGonagall, or worse yet--a house elf?

[vmonte]

No: HPFGUIDX 88477

I'm ready to be attacked by everyone but I've been thinking that if I 
were a Professor at Hogwarts the easiest way for me to keep an eye on 
the kids would be to be one of them.  Luna is a very interesting 
character--one that has just appeared in the series--could she be 
Minerva? DD and Minerva both taught/teach Transfiguration, a skill 
that the OOTP adults have yet to use. 
I recently posted a theory that Luna Lovegood might be a Seer because 
of some of her interesting behavior in OOTP. Could this character 
instead be Minerva, or better yet, a house elf?  The description of 
Luna is that she has protuberant eyes that always look as though she 
is surprised--remind you of a certain elf? Luna does wear some 
unusual things--something I could see Dobby wearing!