Is the ape Titan Eren's dad? - Quora

How did Grisha see Zeke in episode 79 of Attack on Titan? - Quora

Why did Grisha gave Eren the Attack Titan? : r/ANRime

Why did Eren allow grisha to see zeke,was it simply out of kindness or was there something more to it? : r/ANRime

How did Eren communicate with Grisha? - Quora

When and how did Eren eat his father? - Quora

Grisha Yeager/Gallery, Villains Wiki

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

Eren manipulates Grisha in Japanese sub using English letters/ romaji

How could eren manipulate grisha? I mean he was just seeing grisha's memories, wasn't he? Then how could that happen? (He was not even using founder's powers, zeke had control over that)

Why did Zeke betray Grisha in AOT? - Quora