Aruṇa (Aruna) is the son of Narakāsura (Narakasura). After the death of Narakāsura, Aruṇa (Aruna) and his six brothers fought against Kṛṣṇa (Krishna) and got killed.

Bhāgavatpurāṇa Vols. 1-12(10.59.12-13)