Zoroaster Leviathan

Zoroaster Leviathan, formerly known as Zoroaster Berith, is a supporting character in DxD: ExTrA, as well as one of the current Satans in the underworld, holding the title as the manager of general affairs. He's Alice Berith's older brother, but because of his position as the demon lord, he no longer can inherit the Berith name, thus making her the next head of the clan.

He serves as the tutor as both Hiroyuki and Alice, the manager of the 22-Cards Arcana Challenge and the main reason why the current system of the three factions is getting thinner and thinner.

Appearance
Zoroaster is a tall, handsome young-looking man with golden short hair with wild and spiky bangs, fair skin and muscular build. Because of Mary Beelzebub's inplants of new experimental organs on him, one of his eyes glow a very supernatural white, while the other maintaned the original golden color.

He usually wears the usual Satan Gears of long cape, shoulder shields and armor during his stay on the underworld, however, during his time in the human world, Zoroaster wears several outfits that can vary from casual to downright cosplay.

Personality
"Why do I hate your chuuni so much?! It reminds me of HIM!!"

- Alice Berith Zoroaster, not unlike Hiroyuki, is what people might call a Chuuni: Despite his genius-level intelect and prodigy control over his family's Dark Flames, he rather talk about anime and manga and dress accordantly to further enjoy his own mental experiences.

Zoroaster is nonsensical, mild-mannered, carefree and sometimes arrogant, as he doesn't treat the other satans at they should, considering himself the rival of his fellow demon lord Cohen Lucifer and being the main source of annoyance of Mary Beelzebub. Also, not unlike Hiroyuki, he has the habit to throw very campy and overactive performances.

However, when the situation calls for it, he can be very serious and responsible. as the head of the supernatural affairs, Zoroaster can be very eloquent, persuassive and well-mannered. he also loves his little sister Alice, turning himself into a satan in order to leave the spotlight as the head of the Berith clan for her. He also took a liking of Hiroyuki, seeing how close he is to his sister, and how he's extremely effective in her imersion in social life. Of course, both of them also considered themselves rivals during their chuuni delusions, much to Alice's annoyance.

History
The eldest child of the Berith clan, he became a fan of the Oppai Dragon as a kid, and since then, he's submerged in his own delusions of greatness. While a genius in the control over the Berith's dark flames and immense demonic power, Zoroaster never left his immature tendencies. Sometime before the proper series start, he became the Leviathan satan, leaving the position as the next head of the Berith clan for his little sister Alice, knowing that would be a better leader than he'd ever be.