Why Grisha Yeager and Frieda Reiss is an integral part of Eren and Zeke's journey in Attack on Titan Final season part 2

According to the preview shown at the end of Episode 3, the next episode of Attack on Titan Final season Part 2 is set to feature a revelation to the Yeager brothers, Zeke and Eren.

The Entire Attack On Titan Timeline Explained

Why did Grisha Yaeger scream out 'Is this what you want Eren' after killing the Reiss family? Was Eren controlling him? If so, how and why? - Quora

Shingeki no Kyojin – The Final Season Part 2 – RABUJOI – An Anime Blog

Attack On Titan: A Complete Timeline Of The Anime

Attack on Titan: Eren Yeager / Characters - TV Tropes

THE WHOLE TIME TRAVEL AND FATE THING WAS THE WORST THING TO HAPPEN TO SNK : r/titanfolk

Eren Manipulates Grisha to Survive – Attack on Titan S4 Ep 20 Review – In Asian Spaces

Attack On Titan: How Important Was Grisha To Eren's Plan?

Zeke Jaeger (Anime) Attack on Titan+BreezeWiki

Attack on Titan: Eren Yeager / Characters - TV Tropes

attack on feelings — So this is Grisha soon after he ate a shifter and

Shingeki no Kyojin: el poder secreto de Eren en Attack on Titan, Ataque a los titanes, Animes de Crunchyroll, FAMA

Why did Grisha tell Zeke to stop Eren here? This is when manga was in kino phases, everyone loved it, and nobody questioned it then. Any opinions? : r/titanfolk