Keto is a central figure in the anime series The Duke of Death and His Maid, also known as Shinigami Bocchan to Kuro Maid. As one of the main characters, Keto plays a crucial role in the daily life of the Duke, Albert, serving as both a butler and a trusted companion. Standing tall with a muscular build, Keto cuts an imposing figure, often dressed in a classic butler’s uniform. He sports short black hair and a serious expression that might initially seem intimidating—yet this outward sternness contrasts beautifully with his genuinely warm and cheerful personality.

Despite his formal appearance, Keto is incredibly kind-hearted and deeply empathetic. He consistently puts others first, especially when it comes to the well-being of the Duke and the rest of the household. His work ethic is unmatched; he’s always ready to lend a hand, whether it’s handling chores or offering emotional support. And while he looks like someone you wouldn’t want to cross, Keto is actually very approachable and has a natural ability to connect with people, quickly becoming a friend to those around him.

Over the course of the series, Keto proves to be much more than just a servant—he becomes a mentor, a confidant, and a calming presence for the Duke. Whenever the Duke feels overwhelmed by his circumstances, Keto is there to listen, guide, and offer sound advice. Interestingly, despite his reserved nature, Keto has a great sense of humor. He often uses light-hearted jokes to ease tension, bringing a sense of warmth and balance to the atmosphere of the estate.

One of the most defining traits of Keto is his unwavering loyalty. This isn’t just part of his job description—it’s who he is at his core. No matter how difficult things get, Keto remains steadfast in his commitment to the Duke. Even during moments of crisis or uncertainty, he never wavers. His dedication goes beyond duty; it’s personal. That kind of loyalty makes Keto not only a dependable butler but also an essential pillar of the story.

When looking at personality types, Keto from The Duke of Death and His Maid strongly aligns with the ISTJ type—Introverted, Sensing, Thinking, Judging. This makes a lot of sense when you observe how he operates. He’s reliable, disciplined, and highly organized, always approaching his responsibilities with logic and precision. Though he may come across as quiet or serious, that’s simply because he values practicality and structure over emotional displays. His attention to detail ensures everything runs smoothly, and he’s always thinking ahead, anticipating problems before they arise.

In addition to being an ISTJ, Keto also exhibits strong signs of being an Enneagram Type Six—the Loyalist. This aspect of his personality shines through in his deep devotion to the Duke. For Keto, the Duke represents stability and purpose, and his loyalty stems from a need for security and belonging. Like many Type Sixes, Keto sometimes struggles with self-doubt and anxiety, often questioning whether he’s doing enough or if he’s truly capable. But rather than let those doubts paralyze him, he channels them into a stronger drive to protect and serve.

His sense of duty is profound. He takes his role seriously—not out of obligation alone, but because he genuinely cares. There are multiple instances where Keto places himself in harm’s way just to ensure the Duke’s safety, showing just how far his loyalty extends. These actions reflect the core values of a Type Six: responsibility, preparedness, and above all, faithfulness.

All in all, Keto from The Duke of Death and His Maid stands out as a character defined by integrity, compassion, and resilience. Whether it’s through his structured mindset as an ISTJ or his deep-rooted loyalty as an Enneagram Six, Keto’s personality enriches the narrative in meaningful ways. He may not seek the spotlight, but his presence is felt in every scene he’s in. Truly, Keto is more than just a butler—he’s a cornerstone of the series, and his impact on the story—and on the Duke—is immeasurable.