is attack on titan (shingeki no kyojin) episode 63 filler?

Reiner Braun runs into a breathless Falco Grice out in town. When asked where he is going, Falco says that he has left something behind at the headquarters and is going to retrieve it, but in actuality he is mailing a letter outside of the internment zone for Mr.

Kruger, the disabled soldier he had met upon returning to Liberio. In the evening, Theo Magath learns from Koslow that the entirety of the Tybur family has come to visit.

As the two go to meet their visitors, Koslow notes that the Tyburs' personal guards are not part of the Marleyan military.