The animation looked like an anime. The main character was a young schoolgirl with short red hair and she had a flying squirrel as a pet. In the beginning she transferred to her grandfather's school, and there she learned that she could summon a machine on her forearm which gave her superpowers of some sort. I was young when I watched it but I remember that she and I think 4 of her friends had these "special powers" that were activated by these machine like things on one of their wrists. I also know there were these two siblings who were famous singers but they worked for the evil ones.
I don’t remember when I saw it exactly but it might’ve been 2010ish. It might have been made in the late 80s or 90s.