Demon Slayer: Kimetsu no Yaiba
Season 04
S04E04 - To Bring A Smile To One's Face
In Muichiro’s rapid movement stage, Tanjiro witnesses his strict attitude as he instructs and spars with the trainees, emphasizing perseverance even when injured. Muichiro, while acknowledging his harshness, intends for them to learn that even one mistake could be fatal in battle. Later, he spars with Sanemi and Obanai, who have taken up nightly combat training to improve their skills. Muichiro is impressed with Tanjiro’s quick learning and ability to spar with him, allowing him to proceed to the next stage. Before doing so, Tanjiro challenges him to a paper plane contest, under the condition that he treats the trainees better if he wins. Though Tanjiro loses, Muichiro decides to change his attitude upon seeing the trainees’ joy when flying their own planes.
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