Marcel Galliard

Berik was a comrade and childhood friend of Reiner Braun and Bertholdt Fubar. Little is known about him, other than the fact he sacrificed his life to protect Reiner and was devoured by Ymir in her Titan form. It is known that he died somewhere outside Wall Maria prior to it being destroyed, suggesting he may have been one of the Titan Shifters on a mission to attack and infiltrate the Walls. However this is unconfirmed, and seems unlikely as logically he could have simply transformed.

Story
When a group of Titans were attacking a tower in Castle Utgard, Reiner led the other rookies in defending the interior of the tower. While attempting to barricade the door against an invading Titan, he recalls being attacked and nearly killed by a Titan years early. Before the Titan could catch him, he was pushed out of the way by Berik and was forced to watch the Titan devour his friend in his place. He is snapped out of the memory by Bertholdt calling for him, and the two manage to fend off the Titan while promising to return home together.

The following morning, with no weapons and their superiors all dead, the rookies prepared for the end. However, Ymir chose to reveal her secret and transformed into a Titan, fighting to save the others. Reiner and Bertholdt were shocked upon realizing that Ymir was the same Titan that attacked them years earlier and killed Berik.

Later, in the Forest of Giant Trees, Bertholdt expresses concern over whether they can trust Ymir and reminds Reiner of Berik's death at her hands. He later questions Ymir about it, and she states she doesn't remember doing it. Bertholdt accepts her apology, stating that she probably didn't want to eat anyone.