Veela questions

[lipglossusa]

No: HPFGUIDX 31147

I've been wondering-- what exactly are veela?  All we really know 
from GoF is that they are beautiful women who turn into harpies when 
they're angry.  They appear to have all sorts of powerful magical 
qualities, but they are not listed in FBWTFT, so they aren't 
"beasts."  Fleur Delacour says that her wand core is made from the 
hair of a veela, her "grandmuzzer."  All of the other beasts that are 
used in wand cores (unicorns, dragons, phoenixes) are powerfully 
magical creatures, so it would appear that veela must be as well if 
their magic can be harnessed to cast spells.  However, while JKR uses 
their power over the minds of men, especially Ron, as a running gag 
throughout GoF, might this power be some form of Dark magic?  It has 
some of the same properties as the Imperius curse.  Fleur is only 
part-veela, and she is still able to control men, or at least get 
them to do things she wants them to.  She doesn't appear to have any 
malicious intent, but again the magic in veela must be very strong if 
Fleur is able to retain these veela qualities from her grandmother.
It seems to me that an "evil" veela would have an awful lot of power 
if she chose to go over to the dark side.  I also wonder what other 
kinds of powers veela have, especially when they transform into the 
harpy-creatures we see on the Quidditch field.

Other members have brought up the fact that Harry seems less affected 
by veela than Ron, except during the first time he sees them at the 
Quidditch World Cup.  But at Hogwarts, he doesn't appear to be 
bewitched by Fleur much at all, as compared to the rest of the boys.  
Again, I am put in mind of the Imperius curse, which Harry is able to 
fight off several times during GoF, and I wonder if his control of 
mind when he is under this spell is also the reason why he is largely 
unaffected by Fleur.  Any thoughts?
Marina