Who was with Voldemort at GH?

[Lia]

No: HPFGUIDX 145903

Pat said:
 
I've always assumed that it was the ability of magical children to do 
magic before being trained - as in, Harry re-growing his hair, 
shrinking Dudley's old sweater, etc. - that saved Harry: he did it 
himself.  Of course, it's also possible that somebody else who was 
already there had something to do with it!
(sorry to be so behind in posting this - I got behind in reading over 
the holidays.)

Lia replies:
Pat, I think, at the risk of being quite tongue-in-cheek, that you are
referencing what is commonly called the "Charmed Phenomenon", a
condition, albeit a helpful one, possessed by children of witches
which enables them to protect themselves seemingly at will (often with
a shield of sorts), although it is actually a reflex.  Hence, these
children often perform magic without truly intending to do so.  The
"slang name" derives from the television show of similar name.

Seriously--as opposed to Siriusly--you bring up an interesting point.
 The question of who accompanied LV is one that's pestered me for some
time.  For some reason, I had always assumed (dangerous to do) that
Voldemort was alone.  LV often acts alone, and is depicted in many
ways throughout the canon as solitary, even when surrounded by others.
 Your "self-protection" theory would serve to bolster my assumption.
It's a good, sensible theory.  Still, others have raised the issue of
accompaniment, and it would seem that someone else might have been
there.  My guess here would be either Snape or Bellatrix--because it
would explain the actions and behavior of either in later events. 
(e.g., Snape's "re-allegiance", Bellatrix's claims of closeness to LV,
and so forth).  However, the introduction of RAB--whomever that may
be, Regulus or otherwise--may indicate a different person altogether.

Do I sound confused?  I am, truly, of many minds on this topic.  I
have changed viewpoints about 50 times, methinks.

--Lia, currently bemused, befuddled, and bewitched