She's the sole member of the Audio Club, though that's mostly because she's there for the massive archive of audio files the club maintains. At some point she had to surrender part of that storage to the student council, which probably wasn't ideal. When Eizoken approached her about becoming their audio adviser, she agreed—but only if she could basically live in their club room. And that's kind of how she ended up splitting her time between two clubs.
Content compiled by AnimeList.moe from publicly available sources.