Blackbeard might kill Eris, and it might be Oda’s darkest parallel yet in One Piece

Blackbeard in One Piece is one of the most unpredictable characters, but in the recent God Valley Incident flashback, some events took place that have caused the fandom to come up with another theory. We know that he is the son of Rocks D. Xebec and Eris, but according to this theory, fans believe that, looking at this character pattern and Oda's themes, Blackbeard might have killed his own mother. This theory builds on the idea that Teach, unlike many villains in One Piece, wasn’t created by tragedy; he may have chosen evil long before he became the man we know today.

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Eris as a protective mother and Blackbeard’s ultimate “weakness”

Eiichiro Oda has been famously known to state that the reason why mothers are not part of the story. He has said that mothers tend to be too protective of their children to go on dangerous adventures. This statement is important to keep in mind because it explains why so many mothers in One Piece die or are absent entirely.

Applying that logic to Eris, who clearly demonstrated strong will and emotional grounding, creates a dark contradiction. If Eris had lived and stayed in Teach’s life, there’s almost no way she would have allowed him to become a pirate, let alone a man chasing the throne of the world.

After suffering in the God Valley incident, Eris lost her husband, her home, and almost her son. Naturally, she would have been the obstacle that each felt he needed to remove. Not because she was abusive. Not because she failed him. Teach might believe that love is a weakness and that caring about someone is what caused Rocks to fail his dream. And if Teach feared failure above anything else, then eliminating that weakness becomes a cold, strategic choice.

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The Doflamingo parallel: When hatred turns into violence

This theory gains more weight when compared to one of the most infamous moments in One Piece, that is, when Doflamingo mercylessly killed his father. Just when fans felt bad towards his backstory then Eiichiro Oda pulled the biggest twist.

The reason why Doffy murdered Homing was not for survival, but out of resentment and entitlement. It cemented him as irredeemable. That is why chances are a Blackbeard–Eris tragedy in One Piece could follow the same storytelling pattern.

Fans are already softening toward Rocks after the God Valley flashback, and many are starting to imagine Teach’s childhood as heartbreaking rather than monstrous. But Teach killing Eris, especially if she was trying to protect him, would instantly snap the narrative back to one point: Blackbeard is not a misunderstood villain. He is evil by choice.

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The Keyser Söze logic: Remove the weakness before others exploit it

Some fans compare this theory to The Usual Suspects, where the villain kills his own family to prevent others from using them as leverage. Teachers may operate under the same ruthless logic. If the people of God Valley were slaughtered, if Rocks vanished, and if Teach was left traumatized, he may have concluded something horrifying:

• Those who love you can be used against you,
• They can slow you down,
• Or they can stop you from achieving your dream altogether.

By killing Eris, Teach in One Piece would be eliminating the last emotional chain tying him to a normal life. In his logic, it would be the final, necessary step toward becoming the unstoppable force he wants to be.

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Teach already killed a brother, and father is a mother, really off-limits in One Piece?

People forget that Blackbeard in One Piece has already:

• Betrayed and killed his crewmates
• Killed the closest thing he had to a father figure (Whitebeard)
• Sparked the war that devastated Marineford
• Continues to manipulate, exploit, and execute anyone who stands in his way

This is not a man who cares about family bonds in the traditional sense. If anything, Teach views relationships as tools, and when tools are no longer useful, he discards them violently. Eris, being strong-willed, protective, and morally grounded, is the opposite of what Teach wants in his orbit. And that may have sealed her fate.

If Oda wants to solidify Blackbeard as the ultimate villain, the true final evil opposite of Luffy, then having Teach kill Eris in One Piece would be the final proof that he was never meant to be redeemed.