In "Demon Slayer: Kimetsu no Yaiba", Tanjiro was able to see the Usagi because the Usagi took the initiative to show up, so he could see it.

Qiang Tu was the original member of the Demon Slayer team, and he sacrificed his life to save Tomioka during an assessment. After the sacrifice, his soul returned to the place where he had trained and met Tanjiro.

If Qiangtu doesn’t show up actively, humans won’t be able to see him. Here he showed up on his own initiative because he saw that Tanjiro was a good young man and wanted to teach him seriously and let him complete impossible tasks on his behalf.

Character Introduction

Qiu Usagi, one of the characters in the manga "Demon Slayer" and its derivative works. Disciple of Rintaki Sakonji, senior brother of Tanjiro Kamado, and friend of Giyu Tomioka.

Medium-long flesh-colored hair, silver pupils with horizontal lines, and a scar from the right corner of his mouth to his cheek. Wearing a disaster-repelling fox mask with scars at the corners of the mouth, and a tortoise-shell patterned haori in yellow, orange, and green colors. Have a sense of justice and be kind-hearted. Gifted with extraordinary talent, Tomioka Yoshiyuki admitted that his swordsmanship skills back then were not as good as those of Chiu Usagi.