Help with Lupin's boggart / Cockroaches

[justcarol67]

No: HPFGUIDX 97458

Carol wrote:
<snip> I really don't see why Lupin would lie to Hermione about his
boggart being the moon when he's in the process of confessing 
thathe's a werewolf. What could be more terrible in Hermione's 
eyes than that (unless he's a DE and a prophecy orb or crystal 
ball would somehow lead her to figure that out).
 
Pippin responded:
If Hermione *asks* Lupin whether his boggart is a full moon, but 
it's actually not, he'll have to lie about it and risk arousing 
Crookshanks, or tell the truth and have Sirius learn something 
Lupin might not want Sirius to know. Hermione doesn't know the 
right questions to ask, but Sirius does.
 
Sirius sees Lupin's boggart in OOP, but by then the idea that it 
represents the full moon is planted in his mind. Interestingly, 
Lupin doesn't use the riddikulus spell on the boggart in OOP. He 
vanishes it.
 

Carol again:
I'm not sure I buy the part about Sirius (which I know is your link to
ESE!Lupin), but I also wondered about Lupin's simply vanishing the
boggart in OoP. Maybe it *is* the riddikulus spell, but he's so
familiar with it that he doesn't have to say it out loud--silent magic
of the type that Snape uses to write potions recipes on the board, as
I mentioned in a post to a different thread. But if that were the
case, wouldn't the boggart have assumed a ridiculous form before
vanishing (becoming a cockroach or whatever)?

Carol, who doesn't believe in ESE!Lupin but does think there's more to
him than meets the eye