Indra, 'the destroyer of cities', was the warrior god of the Vedic Aryan nomads.
The god of the heavens, war, sky, clouds and monsoon, guardian of the East. The principal god in the Rig Veda. He could bring rain, hence his importance to the Aryans, who worshipped gods ruling over the natural elements. Indra is often represented holding a vajra, or thunderbolt, the symbol of lightning.
Leader of the thirty-three prominent Vedic gods, he rules over the eastern territories, and for that reason was frequently represented on the eastern side of the Angkorsanctuaries.
Indra progressively lost his preeminence to Shiva and Vishnu as Hindu mythology started to focus on his weaknesses; Indra likes to get intoxicated with soma, the divine liquor from which he derives his powers, whereas Hindu gods get theirs from penances and austerity. Krishna made clear, when he protected the cowherds against India’s rains, that Indra was a deity of inferior status.
Indra also appears in Buddhist lore as an attendant or devotee of the Lord Buddha.