When personification, and the needs of the theology, had made Haurvatat an archangel, he, together with Ameretat (Amerdat), "Immortality," took the presidency of the vegetable world, which it was the business of the pair to keep in good condition.
In the council of Angro-mainyus, Ako-mano stands in direct antithesis to Vohu-mano, as "the bad mind," or more literally, "the naught mind"-- for the Zoroastrians, like Plato, regarded good and evil as identical with reality and unreality.

Ako-mano's special sphere is the mind of man, where he suggests evil thoughts and prompts to bad words and wicked deeds.

He holds the first place in the infernal council, as Vohu-mano does in the heavenly one.
Indra, who holds the second place in the infernal council, is evidently the Vedic god whom the Zoroastrians regarded as a powerful demon, and therefore made one of Angro-mainyus's chief councillors.

He probably retained his character as the god of the storm and of war, the destroyer of crops and cities, the inspirer of armies and the wielder of the thunder-bolt.

The Zoroastrians, however, ascribed to him only destructive actions; while the more logical Hindoos, observing that the same storm which hurt the crops and struck down trees and buildings was also the means of fertilizing the lands and purifying the air, viewed him under a double aspect, as at once terrible in his wrath and the bestower of numerous blessings.
Qaurva, who stands next to Indra, is thought to be the Hindoo Shiva, who has the epithet qarva in one of the Vedas.