Who are Sirius Black and Severus Snape

[potioncat]

No: HPFGUIDX 104517

Potioncat:
snip
I think Hermione knows something about Snape that she isn't 
telling.  He really should be nicer to her.
 
> Alla:
> What does she know? I want to know that too. :o) Do you think she 
> made another observation after vampire essay just like she made 
after essay about werewolves? Or did you mean something totally 
different?


Potioncat:
I don't know what she knows, but I'm sure she knows something. She 
seems to stand up for him in OoP...and she seems disappointed that 
he isn't nicer.  Either she learned something while doing her 
vampire essay that relates to Snape, or she learned about him when 
she looked into registered animagi, or while she was at Grimmauld 
Place, or who knows what or when...

But it wouldn't be the first time she learned something and kept her 
mouth shut about it.  I don't know what it is.  I don't know if 
Snape knows she knows....but I'm pretty darn sure she knows 
something I don't know!

Potioncat (for that matter, lots of people know things I don't know)