Is Diablo stronger than Rimuru?

In the boundless world of That Time I Got Reincarnated as a Slime, two figures stand as the series’ most terrifying forces—Rimuru Tempest, the ever-evolving slime deity, and Diablo, the enigmatic primordial demon with centuries of combat perfection. On the surface, Rimuru is the master, and Diablo the servant—but beneath that relationship lies one of the most intense power parallels in all of anime lore. So, who truly stands at the top? Let’s break this clash down to its core.

Diablo: The Super Special Demon

Diablo isn’t just any demon; he’s the demon’s boss. What’s truly bizarre is that he can’t be killed permanently. He keeps returning, which keeps everyone on their toes. Feldway, who is all about preparation, is aware that Diablo is Rimuru’s primary protector and is preparing to deal with him.

Diablo is ancient, which makes him extremely powerful. He utterly outclassed Rimuru when he initially debuted. Older demons are stronger, and Diablo is one of the oldest. Some say he’s the second oldest after Guy Crimson, although the precise figure is unknown.

Rimuru: The Rising Star

Rimuru, who began as a slime, is a true underdog story. He has a new form named True Demon Lord, but Diablo was already one step ahead of him. Diablo’s brute power isn’t the only thing that puts him ahead; his magical abilities also help. Rimuru’s inexperience also holds him back, especially when contrasted with Diablo and his friends.

But don’t write Rimuru off just yet. He has a secret weapon called Food Chain that grants him incredible power. Being strong, however, does not guarantee victory. Rimuru’s makeover in Volume 15 is game-changing. He’s nearly like a deity now, and that alters everything.

The Big Showdown: What’s Next?

The fascinating aspect is that Diablo and Rimuru are on a collision course, and no one knows who will prevail. Diablo’s never-ending comeback collides with Rimuru’s rising power. Diablo is like a difficult puzzle, but Rimuru is growing into a cosmic powerhouse.

This conflict is significant because no one knows who will triumph. It’s the unknown that makes it so intriguing. Diablo and Rimuru have quite distinct strengths, and they’re leaving an indelible stamp on fantasy history. So, who will triumph? That’s a question that will have fans discussing for quite some time.

Growth Potential vs Combat Experience

This is the heart of the rivalry.

Match-Specific Breakdown: Who Has the Edge?

• Diablo: Reflect-type magic, magic resistance, soul attacks, status immunity, teleportation, extreme speed.
• Rimuru: Predator, Spatial Domination, Multilayer Barriers, Infinite Regeneration, Raphael (Ciel), skill theft.

Diablo counters predictable magic-based enemies. Rimuru thrives in chaotic, unpredictable environments.

Hax Abilities

Rimuru’s Predator skill alone is a cheat code. Add Food Chain, Spatial Domination, and his connection to Raphael/Ciel—and he’s playing on an entirely different battlefield.

Diablo’s toolkit is tighter and less flashy, but in a controlled duel scenario, his execution is terrifyingly effective.

The Army Factor – Power Multiplied

A leader is only as powerful as those who follow.

• Rimuru commands a thriving nation—the Jura Tempest Federation—including evolved ogres, dragons, and Demon Lord-class allies.
• Diablo, while usually a lone wolf, is canonically capable of leading entities on par with Nazarick’s top floors.

But here’s the difference: Rimuru gains actual stats and energy from his followers due to Food Chain. Their growth directly feeds his own.

Final Verdict: Who Is Stronger—Right Now and Later?

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