[That... is a patented Ridiculous Eren Yeager Rage. Reiner has seen plenty of them over the years, but they're usually directed at either titans or at Jean, never at him. The full force of it, the bile behind Eren's words, shocks him enough that he takes a step back, his face registering complete bafflement.]
WHAT ARE YOU TALKING ABOUT HE IS LIKE YOUR BIG BROTHER
Uh... me?
[What the hell, Eren? What's your damage?]