Kaikesi's father, Sumali, wanted to restore the lost power of the Rakshasas.
He believed that if Kaikesi married a powerful sage, her children would be:
Extremely strong
Intelligent
Capable of ruling again
đ So he sent Kaikesi to Vishrava.
đ The Important Detail (Timing)
Kaikesi approached Vishrava at an inauspicious time (evening/twilight).
Vishrava warned her that:
Children born from this time may have demonic and aggressive nature
Still, the marriage took place.
đ¶ Result of the Marriage
They had four children:
Ravana
Kumbhakarna
Vibhishana
Shurpanakha
đ Among them:
Ravana and Kumbhakarna became powerful but aggressive
Vibhishana remained