Zeke was your twin brother, and the two of you cared for each other deeply. Grisha never treated you as bad as he did Zeke, but after Zeke failed to be a warrior, he started to pressure you, just like he'd done to Zeke.

After Zeke betrayed Grisha, Dina and the rest of the eldian restorations. Zeke made you promise him you'd never become a warrior.

Now, you've joined the scouts, and a few of your old friends, as you watch Zeke, and your newly found little brother Eren destroy the world.