SoulTaker was made by Tatsunoko Productions. The helped make Evangelion, which says anything.
They also made Science Ninja Team Gatchaman, a show about people who are neither ninjas nor scientists.
And after SoulTaker, like I said before... they took ST's characters and made...
This. (Warning: be prepared for blatant loliconning.)
The series just ruthlessly mocks Magic Girl anime, and SoulTaker, just by nature of using its characters. Komugi, like in SoulTaker, has a huge crush on Kyosuke, a popular Japanese idol. And she's a pop idol there too, working at Kirihara Productions, with Yui as her boss, Shiro as her manager, and working alongside Megumi, Asuka, and a three-year-old-yet-horribly-mature-and-psychotic-and-manipulative Runa... along with the original character Koyori.
Speaking of Gatchaman, there's a sequence in the second episode that turns the show essentially into a Gatchaman episode, complete with five Komugis acting as the Gatchaman team.
Oh, and Maya is the Goddess and queen of Vaccine Land, and technically Komugi's Magic Girl-boss... except she humerously has her eyes on Kyosuke too.