According to Anime Filler List, a crowdsourced website that separates canon from filler for every anime under the sun, “Attack on Titan” actually has no pure filler episodes. Per Anime Filler List, the episodes that contain non-canon material are Season 1, Episode 22, Season 2, Episode 8, and Season 3, Episodes 1-4 (via IMDb). For a show being made while the manga is still publishing, this is a remarkably small number of episodes to contain even some filler. Technically, these chapters contain some filler; should they just be considered pure filler because of that? Or are we just seeing a point of view that the manga failed to consider?
The elements considered to be filler in “Attack on Titan” may more closely resemble the world-building elements added to the “Hunger Games” movies. Since those novels are told entirely from Katniss’ perspective, we only see things that she was actually around to observe. The movie franchise adds in moments that Katniss didn’t witness, such as the riots in District 11 or the conversations between President Snow and Head Gamemaker Seneca Crane.
Often, filler episodes are added because an anime has outpaced its manga, and they need to buy time for the source material’s plot to advance. It’s possible that, since mangaka Hajime Isayama had already planned most of the plot before writing even the first chapter, episodes could move at a quicker pace. An odd byproduct of this lack of filler is that fans have made their own filler episodes that focus on things much more mundane than the average “Attack on Titan” episode, like texting and crushes (via YouTube).
Read More:Every Attack On Titan Filler Episode You Can Skip According To Fans