In Ente Isla, Alciel was one of Satan’s most powerful and intelligent Demon Generals, serving as his strategist and advisor. He played a key role in the demonic conquest of Ente Isla, leading campaigns in battle and overseeing the kingdom’s operations. However, during the war, the Hero Emilia Justina and her allies launched a counterattack, forcing Satan and his forces to retreat.

As Maou and Alciel escaped through a dimensional portal, they were transported to modern Tokyo, where they found themselves powerless and in human form. Without his formidable demonic abilities, Alciel quickly adapted to human life, becoming Maou’s right-hand man in domestic affairs.

Taking on the name Shirō Ashiya, he dedicated himself to running their household, ensuring Maou could focus on earning money while he researched ways to restore their powers.

In his demon form, Alciel had a towering and intimidating presence, with dark red skin, sharp horns, and piercing eyes. His black armor and flowing cape reinforced his role as a powerful general in Satan’s army.

After arriving in Japan, however, he takes on a much more ordinary appearance. As Shirō Ashiya, he is tall and lanky, with long, straight brown hair that reaches past his shoulders. He typically wears plain, inexpensive clothing, such as a simple green sweater and sweatpants, reflecting his obsessive frugality in managing their limited budget. Despite his serious nature, his constantly worried expression and frazzled demeanor make him a frequent subject of comedic moments.

Alciel is fiercely loyal, intelligent, and highly disciplined, serving as Satan’s right-hand man both in Ente Isla and modern Japan. He takes his responsibilities seriously, whether it’s strategizing military campaigns or making sure Maou sticks to their grocery budget.

However, in stark contrast to his once fearsome image, Alciel has become overly cautious, worrisome, and obsessive over daily expenses and household duties. He takes great pride in his role as a caretaker, frequently scolding Maou for being too careless with money or eating too much fast food.

Despite his complaints, he is deeply devoted to Maou and prioritizes his well-being above all else. He is willing to sacrifice his own comfort, often overworking himself to find ways to restore their powers, even if it means spending hours in the library reading outdated books.

While he can be highly analytical and calculating, Alciel is also prone to comedic outbursts, especially when things don’t go as planned. His interactions with other characters, especially Maou and Urushihara, highlight his role as the “responsible parent” of the household.

• Adapting to Human Life
  Upon arriving in Japan, Alciel quickly realizes that without magic, their survival depends on money. While Maou secures a job at MgRonald’s, Alciel takes charge of the household, handling everything from cleaning and cooking to budgeting and research. He often struggles with their low income, stressing over food expenses, rent, and Maou’s tendency to waste money on unnecessary purchases.

• Searching for a Way to Restore Their Powers
  Despite adapting to human life, Alciel remains dedicated to restoring their former power. He frequents the library, studying history, folklore, and supernatural occurrences, hoping to find a way to regain their magic and reclaim Ente Isla. However, his attempts often end in failure, leading to frustration and comedic moments, especially when Maou seems perfectly content with his job at MgRonald’s.

• Clashes with Emi and Other Characters
  Alciel retains his distrust toward the Hero Emilia, often treating her as a constant threat, even when she shows no intention of attacking them. He is highly protective of Maou, sometimes overreacting to minor provocations from Emi. He also frequently argues with Urushihara, another former Demon General, whom he sees as lazy and unproductive. Alciel constantly berates Urushihara for freeloading, though deep down, he still cares for his well-being.