Harry's ability to detect traces of magic

[gelite67]

No: HPFGUIDX 151563

---> 
> > Angie wrote:
> > 
> > One thing is for certain, Harry's got to figure out how to detect 
and 
> > destroy Horcruxes. 
> 
> Nick now:
> 
> Obviously speculation...
> 
> I've always thought that sensing magic would essentially be Ron's 
> function in the HRH horcrux killing triumvirate.  He's usually good 
> with sensory things/sense of direction.  He's the one who smells 
the 
> Troll in SS, he's the first one to hear the Durmstrang ship in GOF 
and 
> he also is good with sense of direction (finding their way to 
> Trelawney's room in POA).  Plus he's the only one who grew up in a 
> wizard family, so he may have a better feel for these things than 
> people who grew up with Muggles.
>
Angie again:

I love that idea -- Ron finally has a purpose in the story, other 
than being Harry's shadow and confidant.  I've been waiting for Ron 
to "come into his own" and was hoping for more of that than I saw in 
OOP and HBP.

Do you have any theories on what Harry and Hermione's roles will be? 
Do you believe the trio will do it on their own or will anyone come 
with them?