Mayuri

Mayuri is a Spirit born from energy unconsciously emitted by Tooka, Yoshino, Kotori, Kaguya, Yuzuru, and Miku due to their jealousy over Shidou, which gathers into a massive sphere of energy that only Shidou himself, and for some reason Kurumi were able to detect.

Her Angel is Kerubiel, first manifesting itself as a massive sphere of energy, later converting itself as a massive cage, and ultimately into a lance that fires a massive blast of energy.