Demon Slayer's Hashira Training arc was initially thought of by many as a fun side arc with plenty of cool and lighthearted moments for fans to enjoy before the final battle starts. It showed Tanjiro and the rest of the Demon Slayer Corps undertake grueling training under the supervision of the Hashira in order to become more powerful than they had ever been before, with each of the most decorated Slayers taking a look at a specific aspect of combat.