How did Eren find out that he was the one who killed Grisha? - Quora

The EM argument killer. Grisha tells Mikasa is his daughter and

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Worst parent figures and their children : r/attackontitan

In Attack on Titan, when Eren asked the trainee squad teacher about his father, he said it has been 20 years since then and Eren has been a titan shifter for 5

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Eren manipulates Grisha in Japanese sub using English letters/ romaji

Why did Zeke betray Grisha in AOT? - Quora

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EREN MANIPULATES GRISHA DUB vs SUB Attack on Titan Season 4 Episode 20