The female characters from the Niea_7 TV series from 2000.
Niea (ニア)
Chigasaki Mayuko (茅ヶ崎 まゆ子)
Komatsu Chiaki (小松 ちあ紀)
Hiyama Kotomi (樋山 言実)
Karna (カーナ)
Mayuko is one of those nowadays rare poor cram school students. She finds that the room she's boarding in in the bathhouse she stays at is already occupied by the freeloading alien, Niea. Since the alien mothership crash-landed those several years ago, aliens are no longer a rarity, so Niea's existence is nothing more than an annoyance to Mayuko--or maybe Niea is more important to Mayuko than she initially thinks...