Upashi is Demiqas' wife and a Human Noble Lander. She first shows up in season two, episode 11 of the anime.
Despite her noble background, Upashi doesn't seem particularly invested in it. She was perfectly willing to give up her status to become a housewife to the man who kidnapped her—which, given that she's a Lander and would stay dead if killed, speaks volumes about her trust in him. That confidence means she's not afraid to scold Demiqas whenever his tantrums wreck the house and leave her with a mess to clean. She genuinely loves him, and unlike most people, she sees past his constantly aggressive front to understand who he actually is underneath.
Content compiled by AnimeList.moe from publicly available sources.