Signum

Nanoha As Signum enters the story when Vita has attempted to steal Nanoha Takamachis Linker Core a mages source of magic for the Book of Darkness. Since the arrival of Nanohas cavalry Fate Testarossa and Yno Scrya Vita is cornered and Signum must come to her rescue with Shamal. The Wolkenritter overpower the TSAB troupe with their use of highpowered magical cartridges and Signum manages to snap Fates staff Bardiche in half. The battle ends with Shamal finally managing to get Nanohas Linker Core and Nanoha breaking Vitas barrier. Signum refuses to take a bath that night for fear of Hayate seeing the injuries sustained in her battle with Fate. Signum may appear emotionless but she is completely dedicated to Hayate and as the leader of the Wolkenritter fights for the others as well. The Wolkenritter attack mages to steal their Linker Cores their sources of magic to fill the 666 pages of the Book of Darkness with this power before it saps any more of Hayates and she becomes fully paralyzed. They continue to obtain Linker Cores and fight off interference from the TimeSpace Administration Bureau TSAB mainly Fate with whom Signum faces off during every battle and whose strength she respects and Nanoha while they try to keep Hayate from knowing that they are stealing magic for pages she has told them that as long as she is mistress of the Book she will not allow anyone to be harmed over it. Signum determined to save Hayate even if it means going against her wishes convinces the other Wolkenritter to fill up the Book of Darkness anyway. What the Wolkenritter dont know about Hayate is that the Book once completed may stop sapping her Linker Core for pages but that does not mean that it will stop hurting her or undo its damage. In fact the master of the Book dies upon its completion. Signum continues to masquerade as a distant relative of Hayates while covering up their deeds. Shamal notes that Signum used to be completely emotionless and ordered the other Wolkenritter to act as such in accordance with their purpose but once Hayate came along and treated them like family Signum began to smile. Nanoha StrikerS Ten years after the epilogue of As Signum became the subcommander of the Lightning Squad of the TSAB working under Fate who worked under Hayate. Unlike Vita however she did not participate in training the trainees under the pretense that she is an old fashioned knight and can only teach to them is to get close to their enemies and rip them apart. However near the end half of the series she accepted the request of Erio Mondial to spar with him. During the attack of Saints Cradle Signum fought with Knight Zest Grangeitz who united with Agito. She performed unison with Reinforce Zwei but only managed to end the fight with a draw. The fight continues inside the headquarters of Capital City Defense Forces and Signum came out victorious. In his dying breath Zest asks her to take care of Agito and Lutecia Alpino. Source: Wikipedia