Kūne (also known as Kuune and Cthune) is a Cthugan and Kūko's cousin (the daughter of Kūko's uncle in HR). Her appearance resembles Kūko's despite being taller and has better body figure. Her personality is described as vulgar by Mahiro. She introduces herself as a member of the Galactic Defense Force tasked with overseeing her cousin's job, while her true intent is to buy otaku-related products. She has feeling toward Kūko, and is also clingy that she treats Kūko similar to how Kūko treats Nyaruko. In order to stop her pursuit, Kūko lied to her and said that she is in love with Mahiro and they are already engaged, which made her very depressed. She looks down on Mahiro because he is not as powerful as the aliens, as well as acting hostile toward Nyaruko, as their races are arch-nemesis. She is also a friend of Luhy Distone.