Percy vs Sirus Question

[Tilly]

No: HPFGUIDX 85414

Hi,
My question is this is there any connection in Percy, who has obviously 
gone bad in OoP  being from a good family, and Sirus who is good being 
from a bad family? Is this JKR's way of irony or is there something 
underlying in these two comparisons, maybe that Love is not the root 
of all but friends and colleagues? 
Nikki aka wannabe Minerva McGonagall