Signum(シグナムShigunamu), voiced by Kaori Shimizu (Japanese) and Bailey Chadwick (English), is a character in Magical Girl Lyrical Nanoha A's. She appears in neither the previous series Magical Girl Lyrical Nanoha nor the alternate universe story Triangle Heart, but appears in Magical Girl Lyrical Nanoha StrikerS. Signum is the leader of the Wolkenritter (German > "Cloud Knights"), a creation of the Book of Darkness. Signum's weapon is a chain-link sword called Laevatein, and as a magical creation, she has no familiar. She is named for the Opel Signum, much like characters of Magical Girl Lyrical Nanoha are named for cars, and her device appears to be named after the mythical sword Laevateinn. As per the other Wolkenritter, she has no last name (though in earth she is known as Hayate's mother