Who seems minor in OotP; but will be crucial in DH?

[Dana]

No: HPFGUIDX 170772

Shelley:
> When/were did you hear about Kreacher? 

Dana:

Sorry to not get back at you sooner but I have been trying to find the 
source but couldn't. I know I have red about this ages ago but could 
not remember where. I did see some people state this as well but could 
not find the actual quote. Well it seems that it is no longer a secret 
as it now indeed has been revealed that they were talking about 
Kreacher on both Leaky and Mugglenet. 

Dana