New enemy characters:
Maria Cadenzavuna Eve (マリア･カデンツァヴナ･イブ) CV: Hikasa Youko
Akatsuki Kirika (暁切歌) CV: Kayano Ai
Tsukuyomi Shirabe (月読調) CV: Nanjou Yoshino
Serena Cadenzavuna Eve (セレナ･カデンツァヴナ･イヴ) CV: Horie Yui
Nastasha (ナスターシャ) CV: Inoue Kikuko
Dr. Well (ウェル博士) CV: Sugita Tomokazu
Secretary Shibata (斯波田事務官) CV: Shibata Hidekatsu
"The users of the Symphogear that exist outside the control of the Japanese government are rising up to turn against all of mankind: Maria, and the girls who move with her, Kirika and Shirabe. What exactly is the true intent of Hibiki's new powerful rivals...?"
Maria: A singer who already has fans throughout the world.
Shirabe: A girl who will use any means to accomplish her goal.
Kirika: A very straightforward girl with a cooperative personality.
According to Newtype these new Symphogear users aren't very strong yet and will develop similarly to how Hibiki and co. did in season 1.
It's being speculated that the first character song CD will be a duet song featuring Maria and Serena.