|Japanese Voice Actor||Suzuki Mariko|
|English Voice Actor||Wendee Lee|
|Height:||about 170 cm|
Zilva (ジルヴァ Jiruva ) is a character in Yggdra Union, Blaze Union, and Yggdra Unison. She is the master of the Imperial assassins, the twenty-year-old Zilva leads Gulcasa's Special Forces. She is shown to have perfect control over her emotions, and is usually more-or-less expressionless, speaking in flat tones. Zilva is very dutiful and shows absolute loyalty to Gulcasa, and often handles discreet missions or is dispatched to support one of the Five Dragon Generals. She and her women adhere to a very strict code. She isn't completely emotionless, however; she has taken Leon's younger sister Elena as a special protégée and seems close with her. Once Elena defects and joins the Royal Army, for instance, Zilva shows marked hesitance to do battle with her, despite the fact that the Imperial assassins' code states that betrayal can only be punished with death.
It is revealed in the prequel game, Blaze Union, that she used to be an assassin for the Blessed Papal Army and that she was among those sent to assassinate Luciana and Aegina. She also revealed in the prequel game that she was trained in the art of assassination since she was a little girl. After a series of events, she was cut out of the Blessed Papal Army and joined up with Gulcasa. She has also formed an attachment with the twin valkyries.
Despite her general attitude, Zilva is a sweet tooth and likes cute things; her favorite food is fish.
- Carnage Claw: A bloody claw that turns the wielder into a serial killer.
- Jack Hand: A claw of insanity that rips enemies to shreds.
- Scorpio Tail: A poisonous claw resembling the tail of a scorpion.
- Early Drive: An extremely powerful bow that breaks the sound barrier and pierces the enemy.
- Murderous Mask: A mask that conjures images of death for those who see it.
- Steel Persona: A perfectly polished expressionless mask.
- Nightmare: This macabre mask is the stuff of nightmares.
Zilva's theme is "Night Rushes In" (夜が走る Yoru ga Hashiru ). It is played during Zilva's attacks in Blaze Union.