Eren Kruger is a key supporting character in the manga and anime series Attack on Titan, a secret Eldian restorationist spy inside the Marleyan government and the previous inheritor of the Attack Titan who passes its power to Grisha Yeager.
He operates under the alias “The Owl,” manipulating events from the shadows and setting in motion much of the story’s main plot.
Name: Eren Kruger
Gender: Male
Affiliation: Marley Public Security Authorities / Eldian Restorationists (as covert agent “The Owl”)
Birthday: April 5
Height: 188 cm
Weight: 78 kg
Voice Actor (Japanese): Yasunori Matsumoto
Titan Power: Attack Titan (one of the Nine Titans)
Eren Kruger first appears in Grisha Yeager’s recollections as a seemingly ordinary officer of Marley’s Public Security Authorities.
Behind this façade, he is an Eldian who secretly inherited the Attack Titan and acts as the mysterious contact known as “The Owl” for the Eldian Restorationists.
He provides weapons, funds, and crucial information to restorationist cells within Marley while carefully maintaining his cover.
Even as he aids his fellow Eldians, he also personally tortures and deports many of them to Paradis Island to avoid suspicion and pursue a long-term strategy.
Kruger’s life is defined by survivor’s guilt, revenge against Marley, and an unwavering belief in Eldian freedom.
His decision to pass the Attack Titan to Grisha and his words about “a story you started” resonate across generations and directly shape the fates of Eren Yeager, Mikasa Ackerman, and Armin Arlert.
Childhood and Trauma
Kruger was born an Eldian living on the Marleyan mainland.
His father was a member of the Eldian Restorationists, descended from the royal bloodline remnants that remained on the continent and later became part of a revolutionary army.
Marley eventually discovered this group and brutally purged them.
Kruger’s family, along with many others, were burned alive, but Kruger alone survived the massacre.
This event forged his determination to take revenge on Marley and restore Eldia.
From that point on, his life became one long undercover operation, rooted in hatred but also in a desperate hope for freedom.
Becoming “The Owl”
At some point, Kruger inherited the Attack Titan, one of the Nine Titans.
Using both this power and the help of a sympathetic doctor who falsified his blood tests, he successfully passed as a Marleyan an
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