Is the ape Titan Eren's dad? - Quora

Basement, Attack on Titan Wiki

Yeager family, Attack on Titan Wiki

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

Grisha: The Story of Cellist Gregor by M. Bartley

Attack on titan: Why did Grisha Yegar not reveal the truth of the world to the people inside the walls? - Quora

My brother ate my dad.” -Zeke Jaeger : r/titanfolk

Zeke finding out grisha killed the reiss family : r/titanfolk

Eren manipulates his own father #aotseason4part2 #aot #aotedit #grisha, Eren Yeager

Grisha Yeager · AniList

If Grisha Yeager had been more kind to Zeke, would Zeke have not wanted to wipe out the Eldians? - Quora