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."

- Kostoria to Anos Voldigoad

Kostoria 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
Kostoria 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.

History
Kostoria was born as an imperfect Lion of Destruction who only inherited its eyes. While most of her phantom demon body is intact, Kostoria herself has no eyes because that's the part she received from the Phantom Beast. To incarnate properly, Kostoria and her "siblings" must use the lion's claw to tear the womb of the Princess of Calamity in order to return to the Disaster Abyss of Craving, where they have to incarnate their missing body parts.

Silver Water Holy Sea Arc
Not long after the Militia World became visible, Kostoria and Bobonga head there in search of the Princess of Calamity and find Izabella, her current incarnation. Bobonga is defeated and captured before he could kill her, so Kostoria appears and fires a magic bullet from the sky. Anos uses Beno Ieven to cover his mother, but the barrier is suddenly replaced with the bullet, which explodes. While Anos manages to keep his mother safe, Bobonga escapes and rejoins Kostoria. As they get ready to leave, she realizes that Anos took her one of her prosthetic eyes. Angrily, she tells him 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 with Bobonga.

Disaster Abyss World Evezeino
Kostoria 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 Kostoria 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 Kostoria 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 Princess of Calamity, Kostoria 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): Kostoria can shoot jet-black bullets from the tip of her parasol.

Trivia

 * Kostoria means "eye" in the language of Phantom Beasts, symbolizing her status as the eye of the Lion of Destruction.
 * The nickname Koze 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.