Uṣākṣa(Ushaksha) is a dānava (danava, demon). When Mahadeva sent his soldiers and gods to fight against Śankhachūḍa (Sankhachuda), Mangalagraha(the planet Mars) was engaged in a battle with a demon called Uṣākṣa.

Devībhāgavatpurāṇa(9.22.8)