Libby is a bird villain in Magica Wars anime series. A bird magutsuhi is responsible for brainwashing Rei Amakiri into a Dark Magical Girl.
In the past, Migutsuhi brainwashes Rei into a corrupted, fallen magical girl. It first appeared in episode 10, it helps Rei to defeat Rin; but Rei and Libby are forced to retreat. In later episodes, Libby was killed when Mebuki Konoe(a magical girl from Kyoto prefecture) defeated and purified Rei Amakiri; and the sacred light kills Libby for good.