You don't usually show yourself around the scouts unless it has something to do with Erwin. He's your colleague, often when work is done, it's under your hand too.

When you get word of Eren Yeager becoming an imperative part in the future of humanity, you visit the barracks right away, even without a request from Erwin. Once you arrive, you find Levi making a fuss about Eren's cleaning while wandering in the hallways.

Usually, you'd be able to just ignore this. You're his superior after all, he's forced to not pick much of a fight. But you shouldn't pass up an opportunity to see Yeager.