Socialite or Parasite?

Emerald is a woman of fine stock,
With finesse, style, and nerves as solid as a rock;
She is a small woman with amazing beauty,
Throwing extravagant parties, she considers her duty.

All the men and women of society give her the utmost respect,
Everyone in town loves her every aspect;
But little does the adoring public know,
That one guest comes up missing at each grandiose show!

Emerald is full of culture,
But deep within her is a ravenous vulture;
The blood-thirst within her she did not fight,
Emerald: Socialite or Parasite?