Webon the day before his wedding, giyuu’s sister tsutako made the ultimate sacrifice to protect him from a demon. This selfless act caused giyuu to feel immense guilt for her death, to the point where he believed dying would be a better alternative. Webhe develops survivor's guilt due to his older sister tsutako and his dear friend sabito who sacrificed their lives to protect giyu and believes he doesn’t deserve to be a pillar. The day before her scheduled wedding, tsutako sacrificed her life to protect her younger brother from a demon. From then on, giyu tomioka expressed intense guilt for his sister's death to the point where he began thinking that dying would be better for him. Webremembering his sister tsutako and his friend sabito once again, giyu apologizes to them for his immaturity. Tanjiro grows concerned at giyu's absent reaction, believing he only worsened his pain. Thinking quickly, he believes they can have an eating contest, since he cannot spar yet, and giyu at an eating contest means he doesn't have to talk. Weblikewise, during this expansion on giyuu’s origins, fans heard of and briefly saw an image of his late elder sister tsutako tomioka, who was said to have died while protecting giyuu. Webthis is because he was first saved by sister tsutako, who diverted the demon's attention towards her. Later, sakonji urokodaki took giyu under his wing and trained him to become a demon hunter. The fate of giyuu's sister, tsutako tomioka. As mentioned above, the latest episode of the demon slayer anime series formally introduced tsutako tomioka, said to be giyuu's older. Webthe day before her scheduled wedding, tsutako sacrificed her life to protect her younger brother from a demon. From then on, giyu expressed intense guilt for his sister's death to the point where he began thinking that dying would be better for him. Webthe demon begins to regenerate his lost limbs and giyu charges at him to finish him off. Attacking the water hashira, the demon grows a projectile of his own bone and throws it at giyu who shatters it with a block from his blade. Webit’s giyu’s fault that his sister anne sabito died, while it’s tanjiro’s fault for being away while his whole family was murdered. In retrospect, it wouldn’t have made much of a difference, but nonetheless, giyu feels tremendous amounts of responsibility and love towards both his sister and sabito.