Cerberus is a character you’ll definitely remember from the anime and manga series Makai Ouji: Devils and Realist. Now, this series isn’t your average fantasy story—it’s more of a gothic tale with deep roots in mythology and supernatural intrigue. At its heart is William Twining, a young nobleman who stumbles upon a shocking truth: he’s actually a descendant of King Solomon, known as the wisest man in history. And that revelation? It completely changes his life. Suddenly, William finds himself caught up in a high-stakes mission—choosing the next demon king, a powerful figure destined to rule over all demons and influence the balance between good and evil.

Enter Cerberus. Right from the start, Cerberus stands out as one of the key figures vying for the title of demon king. As a three-headed dog, he’s not just visually striking—he’s also deeply symbolic, guarding the very entrance to the underworld. Cerberus embodies loyalty and protection, showing fierce devotion to those he serves. He’s no pushover either; with razor-sharp teeth and massive, powerful paws, he’s clearly someone you wouldn’t want to challenge lightly.

In fact, Cerberus makes his presence known early on when William accidentally opens a portal to the underworld and tumbles into the abyss. The moment William arrives, Cerberus confronts him—initially hostile, naturally, since intruders aren’t exactly welcome down there. But things shift quickly. Once William proves his lineage as a descendant of Solomon, Cerberus drops his guard and even offers his help. That moment marks the beginning of a strong alliance, showing how Cerberus values legitimacy and rightful authority.

Throughout Makai Ouji: Devils and Realist, Cerberus plays a vital role. As the gatekeeper of the underworld, he’s more than just a guardian—he’s a guide. He helps William and his companions navigate the treacherous terrain of the demonic realm, offering both protection and insight. His loyalty isn’t just performative; it’s genuine and unwavering. That kind of dependable strength makes Cerberus an invaluable ally in a world full of deception, magic, and hidden agendas.

Now, if we look at Cerberus through the lens of personality typing, there’s a strong case for him being an ISTP—Introverted, Sensing, Thinking, Perceiving. You can see it in the way he operates. Cerberus tends to keep to himself, observing situations carefully before acting. He’s highly perceptive, picking up on details most would miss. His thinking side comes through in his logical, objective approach—especially when carrying out his duties as a hellhound. There’s no emotional drama, just practical decisions. And when unexpected challenges arise, Cerberus adapts on the fly, which perfectly reflects the perceiving trait.

Overall, Cerberus shows many of the classic ISTP strengths: self-reliance, efficiency, and a no-nonsense attitude toward problem-solving. That said, his emotional reserve and tendency to stay detached might come off as cold to some. But in his world, that kind of mindset makes sense—it keeps him focused and effective.

Then there’s the Enneagram angle. Based on his behavior, Cerberus fits the profile of a Type 6—the Loyalist. This makes a lot of sense when you consider how devoted he is to William. Cerberus doesn’t just follow orders; he genuinely cares about protecting William, often putting himself in danger without hesitation. He’s organized, methodical, and relies on proven systems—hallmarks of a Type 6’s need for security and structure. Plus, his commitment to duty and core beliefs is rock-solid.

Sure, Cerberus might show hints of other types here and there, but his defining trait is loyalty. That’s what sets him apart. Whether it’s standing guard at the gates or fighting alongside William, Cerberus acts out of deep allegiance and responsibility.

So, while personality types like MBTI and Enneagram aren’t set in stone, they do help us understand characters better. And in Cerberus’s case, both frameworks point to consistent patterns. Cerberus may be a mythical beast, but his traits feel real and relatable. In the end, Cerberus stands as a symbol of steadfastness—a protector, a challenger, and ultimately, a trusted companion. And honestly, in a series as complex as Makai Ouji: Devils and Realist, having someone like Cerberus around makes all the difference.