Originally, Indra was a war god that fought with Ashura, but it became one of the two good major deities of Buddhism with Bonten after it was incorporated to Buddhism, and it was considered to have helped Shaka before gaining enlightenment and hearing its preaching (see the article on Indra).
本来のインドラ神は、阿修羅とも戦闘したという武勇の神であったが、仏教に取り入れられ、成道前から釈迦を助け、またその説法を聴聞したことで、梵天と並んで仏教の二大護法善神となった（インドラの項を参照）。