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The Library
of Alexandria

A character in Romance of the Three Kingdoms

Who is Guan Yu?

By the Library of Alexandria · 2 minute read · Updated 23. Okt 2026

In short

  • Guan Yu is Liu Bei's sworn brother in Romance of the Three Kingdoms, attributed to Luo Guanzhong.
  • He is a tall, bearded warrior whose fierce sense of honor shapes his choices.
  • His loyalty to Liu Bei faces a test when gratitude to Cao Cao pulls him another way.

Who Guan Yu is

Guan Yu enters the story as a fugitive with a red face, a long beard and a strict sense of honor. He joins Liu Bei and Zhang Fei as the Han court calls for volunteers to fight the Yellow Turbans.

His courage becomes clear when he faces an enemy champion while a cup of warm wine waits. He returns before the wine cools, showing the fighting skill that makes him stand out among the warriors.

What Guan Yu wants

Guan Yu places great weight on keeping his word, even when a promise carries a cost. His sense of righteousness connects personal loyalty with the brothers' pledge to serve the country and protect its people.

Guan Yu and the others in the story

Guan Yu, Liu Bei and Zhang Fei swear brotherhood in a peach garden behind Zhang Fei's farm. Their vow to live and fight together forms a central bond in a world of shifting alliances.

His tie to Cao Cao brings a different kind of obligation, because Cao Cao once treats him with great generosity. When they meet at Huarong, Guan Yu faces a conflict between duty and an unpaid debt of gratitude.

Questions

Who is Guan Yu?

Guan Yu is a warrior and Liu Bei's sworn brother, known for courage and a fierce commitment to honor.

Is Guan Yu related to Liu Bei?

Their bond is sworn brotherhood, pledged alongside Zhang Fei in the Peach Garden oath.

Why does Guan Yu owe Cao Cao gratitude?

He owes Cao Cao gratitude because Cao Cao has treated him generously, creating an obligation that tests his loyalties.

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