Kostoria Arzenon

"I hate myself. My craving. It's shallow, it's ugly, it's stupid. But like a thirsty heart, I can't always quench it. What I really wanted was this prosthetic eye. It's the only thing that makes me normal. It hides the Magic Eye of the ugly beast."

- Costoria to Anos Voldigoad

Costoria Arzenon (コーストリア・アーツェノン) is one of the Lions of Destruction of the Disaster Abyss World Evezeino.

Appearance
Described as a fine-looking girl with braided hair and beautiful prosthetic eyes. She wears a gray uniform with skulls on her shoulder and the Pablohetara emblem on her chest.

Personality
Costoria is easily annoyed, hotheaded, unpredictable, and stubborn. Her primary craving is envy. She envies what others have and she lacks but admires it at the same time. She has a great deal of self-hate and deep down searches for something genuine.

Silver Water Holy Sea Arc
After Anos captures Bobonga, Costoria appears far above them and fires a bullet at Izabella. Anos uses Beno Ieven to cover his mother, but the barrier is suddenly replaced with the magic bullet. It explodes, but Anos manages to keep his mother safe. This gives Bobonga enough time to escape and rejoin Costoria. As they get ready to leave, she soon realizes that Anos took her prosthetic eyes. Angry, she tells Anos her name and vows that she will take his most precious thing. Anos crushes the eye, but she doesn't fall for the provocation and just leaves with her ally.

Disaster Abyss World Evezeino
Costoria meets Anos again after he joined Pablohetara and earned the right to attend the deep world classes. She tells Anos about the baptism ceremony, where he would have to replicate the magic from deep world students in order to pass. He perfectly replicates their magic and disqualifies them by using Egil Grone Angdroa, which they couldn't use. Only Costoria remains, as she uses her Magic Eyes of Transcription to copy it. Because only the two remained, they make a deal to answer the winner's questions.

Anos then summons Venuzdonoa, which Costoria has difficulty replicating. When she finally succeeds, it stabs her in the chest, resulting in her loss as Anos tells about the sword's unreasonableness. Rather than answering his questions about the Abyss Princess of Calamity, Costoria commits suicide by breaking Zecht, but Anos revives her through Agronemut.

Abilities

 * Magic Eyes of Transcription: This magic eye has the ability to copy any magic with a single glance, even if said magic is beyond her scope of ability. However, she doesn't get to keep said magic and only has it for a limited amount of time. She has to look at the magic again if she wishes to duplicate and use it once more. In addition, the duplicate is slightly inferior to the real thing.


 * Immense Magic Power: As a Lion of Destruction, she possesses a huge amount of magic power. Most of it was concentrated in her missing eyes.

Equipment

 * Lion's Parasol Claw Vegalve (獅子傘爪ヴェガルヴ): Costoria can shoot jet-black bullets from the tip of her parasol.

Trivia

 * Costoria means "eye" in the language of Phantom Beasts, symbolizing her status as the eye of the Lion of Destruction.
 * The nickname Coze that Anos gave her is an old magical word in Militia that means "righteousness". It's a name he wished for her, a beast who acts out of craving, to at least be human.