Yiyu Tomioka in "Demon Slayer: Kimetsu no Yaiba" is as follows:

The birthday is February 8th. On February 8 last year, the official released a birthday greeting picture and posted: "He is the first Demon Slayer 'Hashira' to appear in this game. He wears two patterns of haori and is unsmiling. He looks unhappy. He is so kind, but unexpectedly reaches out to the two Kamado brothers. Today is his birthday, and I hope that he can smile when he is surrounded by friends. "Happy birthday to Tomioka Giyu. Giyu Tomioka is a character in the manga and anime "Demon Slayer: Kimetsu no Yaiba", and is the water column in the Demon Slayer Squad. A swordsman with a cold and arrogant appearance, he is not good at expressing himself with words. Tomioka Giyu lost his father while urinating, and he never left his sister Tomioka Tsutako. The siblings are struggling to survive relying on the property left by their father.

Character setting:

At the age of thirteen, Giyuu joined the previous Demon Slayer Corps, Suizhuashi Nintaki Sakonji, and became the same age as him. The helpless young man Qiu Tu became a good friend. While training with Souto in Mount Samagiri, Giyuu was slapped in the face by Souto because he often said frustrating things like "I'm not as good as my sister." Qiangtu reprimanded Yiyong and said that if Yiyong talks about such things again, he will break up with him. At the same time, Qiantu also encouraged Yiyong to survive firmly in order to inherit the future entrusted by his sister.