[HPforGrownups] Why did Ginevra petrify Mrs. Norris anyway?

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No: HPFGUIDX 98913

  vmonte:

  > All this talk about Ginevra has got me thinking.  Why did she 
  > petrify   Mrs. Norris in CoS? 

Lady Kate:

Clearly Ginny did not do the petrification.  It was the basilisk.  Ginny 
merely opened the Chamber while being posessed.  I am not even sure that 
she had any control over what the basilisk did when it was out.  I can't
 imagine that she hung around the basilisk when it was loose or she would 
have been petrified at the very least or worse, killed like Myrtle.  
Perhaps she would be immune to its effects while posessed?  I doubt it, 
and there is no canon support for that.

Lady Kate