Nagisa is a skilled assassin and the adoptive daughter of Yuma Ansect. She was first seen alongside Branch who was preparing to enter a dance competition. She is immediately noticed by Musica, who remarks that she and Reina were similar because they didn't really have the will to survive.
After several encounters with Musica (which mostly involve her losing her underwear), it is made clear that she is an assassin and that her target is Demon Card's Iulius. Just as she is about to take the shot, Musica finds her and attempts to stop her. He attempts to reason with her, but she shoots him in the leg. She races to the room of a "broken" Iulius and attempts to kill him for the second time but she is foiled once more by the intervention of the Rave Warriors. Recognizing her failure, she attempts to kill herself, though she is stopped by Musica.
When the Blue Gardians attack the dance town seeking Elie, she is kidnapped by Branch who makes her out to be Elie. While the plan originally worked and the Blue Gardians were fooled, Sean Vivera of the Six Guard recognizes her for who she truly is and orders Branch to torture her in order to get the location of Yuma and his troops.
The Rave Warriors rescue the severely injured Nagisa from the Blue Guardians and she soon finds herself on a stolen Blue Guardian ship with the Rave Warriors. She and Musica seem to like each other and become very close, she will even throw herself from the ship - knowing that Musica would save her. (This relationship seems to wilt in the latter parts of the arc).
They receive a transmission from the Blue Guardians ordering all personnel to the location of the Liberation Army hideout for a full-scale assault. Nagisa, distraught by the transmission, asks the Rave Warriors for help. They rush to the hideout, only to find the Liberation Army not under attack. Nagisa informs Yuma of the impending attack, but Yuma furiously responds that she had been tricked. The Blue Guardians tracked the ship to their location.
Later on, it is revealed that she is Hardner's biological daughter.
|Prominent Members||Haru Glory • Plue • Elie • Hamrio Musica • Griffon Kato • Tanchimo • Let Dahaka • Ruby • Julia • Belnika|
|Allies||Galein Musica • Hebi • Remi Maltese • Solasido Sharpner • Fua • Alice • Saga Pendragon • Celia • Unicorn Watanabe • Shuda • Lazenby • Evermary • Bony the Starfish • Nagisa • Yuma Ansect • Iulius • Niebel • Alpine Spaniel • Go • Rosa|
|Deceased||Shiba Roses • Gale Glory • Sieg Hart|