Vania, a blue-haired leviathan demon with cyan eyes, serves as Beelzebub’s assistant secretary in the Demon Realm’s Ministry of Agriculture. Younger sister to the stern and efficient Fatla, Beelzebub’s secretary, she balances her administrative duties with a boisterous, free-spirited nature. Alongside her sister, she shifts into a colossal flying whale form, their leviathan bodies acting as airborne transports and temporary luxury resorts for demonic travelers. When one sister ferries passengers, the other relaxes aboard these living resorts.

Vania’s exuberant personality often leads to impulsive antics, like hunting boars unclothed to avoid “restrictions” or resisting swimwear until coaxed into modesty. Though scatterbrained and prone to mischief, she approaches her role with unwavering loyalty to Beelzebub, even as her carelessness occasionally forces Fatla to intervene. Their sibling dynamic thrives on contrast—Fatla’s exasperation clashes with Vania’s cheerful irreverence—yet their mutual devotion anchors their partnership.

Defined by her duality as both a whimsical youth and a dutiful demon official, Vania’s existence intertwines bureaucratic responsibility with chaotic charm, her bond with Fatla providing both friction and familial stability.