Remember when Levi beat the crap out of Eren during his trial?
Immediately afterwards we see Levi and Hange off to side, clearly discussing the event (Mike is wisely ignoring this lover’s quarrel). I imagine Hange is scolding Levi for the brutality of the beating. And judging from Levi’s posture, he is taking it to heart. He doesn’t look pleased with himself either.
Her lecture prompts Levi to go talk to Eren. While not apologizing, Levi tries to make things right between them.