Marcel Galliard

Berik is Reiner's and Bertholdt's childhood friend. He was eaten up by Ymir's Titan form, when he was trying to save Reiner from her.

Story
When a group of Titans were attacking a tower in Castle Utgard, Ymir transformed into a Titan to fight them. Reiner and Bertholdt recognize Ymir's Titan form to be the same one that ate their childhood friend Berik.

Later, in the Forest of Giant Trees, Bertholdt asks Ymir if she remembers eating their friend. Ymir tells him that she didn't.