Night Blade's Secret Arts (Night Blade.) are two extreme abilities that were artificially created by the members of
Hundreds of years ago, the Night Blade tried to artificially create even more powerful EXS abilities. Various human experiments were performed during this research. The only successful experiments as well as the only survivors of those experiments are Linne and Kuon.
Hilda is quite interested in both abilities, but Linne tells her that those abilities cannot be extracted from their bodies.
Secret Art of Samsara, the Reincarnation () is the ability that's carved into Linne's body.
It turns a person's soul into a parasite that transfers from a body to another once the host body dies. This makes it possible to live eternally in a certain sense. After the transference, the host body "remembers" the memories of Princess of Night Blade. The host body's original personality will coexist with the personality of Night Blade's Princess' personality.
|Playable Characters||Hyde · Linne · Waldstein · Carmine · Orie · Gordeau · Merkava · Vatista · Seth · Yuzuriha · Hilda · Chaos · Nanase · Byakuya · Phonon · Mika · Enkidu · Wagner|
|Non-Playable Characters||Adelheit · Azel · Chiharu · Chitose · Hiroha · Kaguya Seikaiguu · Komatsu · Kuon · Kuu · Lex Bartholomeus · Londrekia Light · Murayama · Ogre · Radiata · Reflecta· Roger · Sakurai · Silvaria · Strix · Tomomi · Tsukuyomi· Tsurugi · Uzuki · Zohar|
|Guest Characters||Eltnum · Akatsuki|
|Organizations||Night Blade · Licht Kreis · Amnesia · EFG · Demon Society · Ritter Schild|
|Terminology||Abyss · Autonomic Nerve · Curse Commandment · EXS · FLS · Hollow Night · Immortalize · In-Birth · Indulgence Weapons · Kanzakai · Re-Birth · Secret Arts · Vessel · Void · Zero Vessel|