I finally realized why I do not believe ESE LUPIN...

[Liz S.]

No: HPFGUIDX 168075

doddiemoemoe:
(SNIP)
I truly like the ESE Lupin theories, really, I do!
However, I cannot make it fit cannon nor characters...IMHO..
So if not Lupin, then who?
I'd argue that it would have to be Dobby...
It would make sense...
Dobby tries to save Harry yet fails miserably..(on purpose?)
Harry's initial response to Dobby is one of mistrust.
Harry gains Dobby's trust by setting him free..(there has to be a
reason why there are such tight restrictions on houseelves)
In the end Dobby ends up in enduring the same fate with the "other
house elves"...

Liz:

That would make sense to me as well.  All you have said would
definitely make for an interesting twist.  However, it would, to me,
seem like another "Snape thing."  Snape has saved Harry's life many
times, and, although he succeeded, he then kills the one person Harry
looks up to the most.  So, even though Snape may or may not be on
Voldemort's side is a different story, I really don't think Dobby will
be the one to turn.  The other reason I don't think Dobby'll turn is
because Dobby worships Harry up and down.  He punished himself every
time he betrayed the Malfoys, and, probably out of habit, he punishes
himself when he betrays someone else.  I feel like he could not become
"evil" enough to betray Harry and not feel bad about it.  I could see
Dobby running to Voldemort, then slamming his head a few times against
a tree or something.  Winky, however...