Indra is the position held by the Prime minister of the Deva-Gandharva-Syena clan, second trinty after the Surya-Agni-Soma alliance. Indra looks directly after the land of Soma, Mt sumeru and its habitants, that are mainly gandharvas, the chief Tenders of the Soma plants.
Around this Land of soma, known as Amravati are the four cities built around the four gates protecting Amravati. Each gate is overseen by a Garuda Ruler. These are the 4 sons of the first Garuda, his name of Syena.