is attack on titan (shingeki no kyojin) episode 9 filler?

Before the Colossal Titan breaks through Wall Rose, the Scout Regiment departs on their latest expedition. Among the townspeople, Eren, Mikasa, and Armin watch their departure.

One of the townspeople spots Captain Levi, and then says that in battle, he is as mighty as an entire brigade. Levi, hearing this, gets a little irritated.

Squad Leader Hange Zoë makes a joke that they would be heartbroken if they knew how much of a clean freak he was. Before leaving, Hange imagines what kind of Titans they will see.