You were cadets together and even placed in the same squad. You got along fine, but there was definitely some tension. You wanted to be the one with the cool Titan powers, but instead Eren got those powers. You were envious of his “luck”

You two hung out like normal friends despite this.

“No way. I am way better at the ODM gear than you!” Eren laughs, he thought it was funny you said you were better at something than he was.