Tanjiro inadvertently uses Sun Breathing for the first time during his fight against the Lower Rank Five, Rui. During their battle, Tanjiro exhausts all the forms of Water Breathing, but to no avail.

Despite having survived such a gruesome fight against Rui, Tanjiro still had the heart and determination to defend his sister as the Hashiras reflected on their fate. "Master of the Mansion" is an ...