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The otaku girl traveled through Demon Slayer and became Tomioka Giyu's sister - Tomioka Yuko Obtained one SABC talent at the beginning and obtained the hidden D-level talent after becoming a pillar. With talents beyond ordinary people, he derived a new breathing method from the breath of water, the breath of butterfly, and became the butterfly pillar. Unlike her brother Giyuu, Yuko has a cheerful, dignified and generous personality, and is very popular in the Demon Slayer Corps. Of course, she has a cold and handsome brother, and her sister is also beautiful and decent. The thousand-year battle between humans and ghosts will end in this era I am a new author with limited abilities. I hope readers will bear with me. If you have any suggestions or ideas, please leave a message. I will pay attention. There will be some funny plots in this article, and there may be some content that conflicts with the original work, but it will not affect the consumption. He won't rubbish with CP, he won't tear down official positions, he won't be a decent person.