Reiner's guilt in 'Attack on Titan' fanfiction is often explored through Bertholdt's memories with haunting depth. Writers love diving into the fractured psyche of Reiner, using Bertholdt's lingering presence as a mirror to his remorse. In one fic I read, every flashback of Bertholdt's smile or whispered words twisted Reiner's guilt sharper, like a knife he couldn’t pull out. The memories aren’t just nostalgia—they’re accusations. Reiner’s breakdowns mid-battle, triggered by Bertholdt’s voice in his head, show how fanfics amplify canon’s themes of trauma.
Some stories go further, blending Bertholdt’s memories with Reiner’s hallucinations, making it unclear what’s real. A standout piece had Bertholdt’s ghost sitting on the edge of Reiner’s bed, replaying their last conversation on loop. The weight of 'what if' crushes Reiner more than any Titan could. Fanfiction often portrays his guilt as cyclical—every time he tries to atone, Bertholdt’s memory drags him back to the day they lost everything. It’s raw, messy, and painfully human.