is the three-headed son of Tvashtri
. With one head, he ate; with another head, he observed his surroundings; with his last head, he read the Vedas
. He grew so powerful that Indra
became frightened of him, especially after Trisiras scorned the women Indra sent to seduce him. Indra killed him and Trisiras' father, Tvashtri, created Vritra
to gain revenge.