Three Gunas

Ravana was Rajasic, drunk with power, passion and self-destructive behavior; his brother Kumbakarna was Tamasic with sloth and slumber; the other brother Vibhishana was Sattvic, left his brother Ravana, joined Rama's camp and surrendered to Him. This is one of the most celebrated Surrenders (Saranagati, Prapatti) to Rama.

Rama crowned Vibhishana, of the serene temperament, King of Lanka, and destroyed Ravana and Kumbhakarna, who symbolised Rajasik and Thamasik qualifies.