In the world of Re:Zero – Starting Life in Another World, there are countless characters who shape the story in meaningful ways. Among them, Petelgeuse Romanée-Conti—also known as Ubilk—stands out as one of the most memorable and unsettling figures. He emerges prominently in the second arc of the anime, leaving a strong impression with his erratic behavior and deep-rooted fanaticism. Petelgeuse is far from your average antagonist; he’s complex, disturbing, and undeniably fascinating.

Petelgeuse serves as a key member of the Witch Cult, a secretive organization devoted to resurrecting the Witch of Envy, Satella. His loyalty to her is absolute, bordering on obsession. In fact, you could say that everything he does revolves around fulfilling what he believes to be her will. This twisted devotion defines much of Ubilk’s actions throughout the series, making him both dangerous and unpredictable. The way he speaks of Satella—with a mix of reverence and longing—reveals just how deeply ingrained his faith truly is.

Now, when it comes to abilities, Ubilk possesses some of the most unnerving powers in the entire Re:Zero universe. For starters, he can possess other people’s bodies, using this power to manipulate events from behind the scenes. But perhaps even more chilling is his creation known as the “Greed Room.” Within this surreal, pocket-like dimension, Petelgeuse holds complete control over space, time, and perception. It’s not just a battlefield—it’s a psychological torture chamber designed to break minds. And yes, he enjoys every moment of it.

So, who exactly is Ubilk at his core? Well, beyond the madness and theatrics, there are patterns to his behavior. When analyzing Petelgeuse Romanée-Conti through the lens of personality typology, many signs point toward him being an ISTJ—Introverted, Sensing, Thinking, Judging. At first glance, that might seem surprising given his chaotic demeanor, but look closer. Ubilk is highly detail-oriented, methodical in planning his moves, and deeply committed to his role as a Sin Archbishop. He doesn’t act on whims alone; each decision ties back to duty and structure, which are hallmarks of the ISTJ type.

Moreover, Petelgeuse is clearly introverted. He rarely seeks companionship and often isolates himself, even among allies. Conversations with him feel forced or unnatural because he isn’t driven by social connection. Instead, he processes the world internally, relying on logic rather than emotion—a trait consistent with ISTJs. Even in moments of intense emotional outbursts (and trust me, there are plenty), those reactions stem from internalized pressure rather than genuine emotional openness.

Another important layer to consider is Ubilk’s moral compass—or rather, his warped sense of responsibility. He genuinely believes he’s doing the right thing by serving the Witch of Envy. That rigid adherence to a personal code, no matter how twisted, reflects the ISTJ’s need for order and purpose. He follows rules, respects hierarchy within the Witch Cult, and takes pride in fulfilling his assigned duties, however horrifying they may be.

Looking beyond MBTI, we can also explore the Enneagram, and here, Ubilk appears to align closely with Type 5—the Investigator. These individuals crave knowledge, seek mastery over their domain, and often withdraw from emotional engagement in favor of intellectual pursuit. Sound familiar? Ubilk spends significant time observing, analyzing, and experimenting—especially during his interactions with Subaru. His approach isn’t purely sadistic; there’s a cold, calculating curiosity behind it all. He wants to understand human nature, suffering, love, and fate—not to empathize, but to dissect.

This thirst for understanding makes him somewhat of a scholar of despair. He fears ignorance more than death, and failure terrifies him—not because of consequences, but because it would mean he didn’t comprehend something fully. That underlying anxiety, coupled with paranoia and social detachment, further supports the idea that Ubilk fits the Type 5 profile.

Of course, no personality assessment is set in stone. Characters like Petelgeuse Romanée-Conti are layered, and reducing him to a single label risks oversimplifying his complexity. Still, recognizing these patterns helps us appreciate why Ubilk behaves the way he does. Whether it’s his ISTJ tendencies grounding him in duty and precision, or his Enneagram 5 drive pushing him toward obsessive inquiry, these frameworks offer valuable insight into his psyche.

All in all, Ubilk remains one of the most psychologically rich villains in modern anime. His presence elevates the narrative depth of Re:Zero, challenging both the protagonists and viewers alike. From his eerie Greed Room to his fanatical worship of Satella, every aspect of Petelgeuse Romanée-Conti leaves a lasting mark. And while opinions on him may vary, few can deny that Ubilk is, without a doubt, unforgettable.