Vritra is a danava in Hinduism. He serves as the personification of drought, and is an adversary of the king of the devas, Indra. As a danava, he belongs to the race of the asuras. Vritra is also known in the Vedas as Ahi. He appears as a human-like serpent blocking the course of the Rigvedic rivers, and is slain by Indra with his newly-forged vajra.

In Hindu mythology, the danavas are a race descending from Kashyapa and his wife Danu, a daughter of the progenitor god, Daksha. It is mentioned that there are one hundred danavas.