Ashtar is a demon in the series.
Ashtar, also known as Attarm, Athtar and Astar, is an astral god attested in multiple Semitic cultures.
In Ugaritic mythology, he seems to be a male counterpart of Astarte (the western Semitic equivalent of Ishtar) and shares her character as a warrior deity. His title is "the strong one." In the Baal cycle, he plays a minor, though significant, role as one of Baal's rivals. Initially, he dreams of kingship, but is rebuked by the sun goddess Shapash, who informs him that he's unfit to rule (possibly in part because he doesn't have a consort) and El plans to make Yam the king. However, later Asherah makes him the king in place of the temporarily deceased Baal nonetheless. Shapash's comments from the earlier part of the myth turn out to be true, which is illustrated as Ashtar being too short to sit on Baal's throne. When Baal returns from the netherworld with Anat's help, Ashtar accepts defeat and leaves Mount Saphon to rule elsewhere. While some translators suggest Ashtar then descends underground, this interpretation is not certain, and none of the other Ugaritic texts support it. In god lists he was equated with Aštabi, a war god from Hurrian and Eblaite texts.
In Arabia, Ashtar was regarded as a god of natural irrigation, in addition to his roles as an astral god and a divine warrior and protector. It's possible that in Yemen he had separate aspects representing the evening and morning star. His cultic role there was considerably greater than in bronze age Ugarit, as evidenced both by local inscriptions and a few references in Assyrian texts.
Like a number of other southern Arabian deities, he is mentioned in inscriptions from the Ethiopian Axum Empire, dating to around 200-400 AD. The Axumites worshiped him as a god of heaven and considered him a part of a trinity which also included the native gods Beher (Earth) and Mahrem (war). Earlier he was likely worshiped in Ethiopia alongside Arabian solar and lunar gods like Almaqah.
Shin Megami Tensei II
Ashtar is the other deity that was forced into becoming Astaroth alongside Ishtar.
Shin Megami Tensei II