Webdemon slayer mark usually comes with a curse that the user will die at the age of 25, but yoriichi still made it to his old age. Being a demon who is immortal, the. Webhowever, this mark is associated with a curse which means the marked person will die at the age of 25. Kokushibo was not bound to the curse after he became. Webdive into the dark allure of kokushibo, an upper rank one demon in 'demon slayer: Explore his role in the twelve kizuki and his profound impact on the. Webkokushibo possesses the power of flesh manipulation which allows him to reshape or alter his body to a scaringly high degree. As mentioned earlier, his katana is. Webafter being beheaded by sanemi shinazugawa and gyomei himejima, kokushibo evolved into a grotesque version of his demon appearance, with protruding fangs, a pair of. Webkokushibo is the only demon who is capable of using breathing abilities, and his blood demon arts provide extra skills and powers, which is why he still maintains the. As a human, he was born in an age where twins were thought to bring misfortune due to succession struggles. Webkokushibo’s eyes possess a mystical ability known as the gaze of transcendence. This power allows him to see beyond the physical realm and perceive the true nature of his. Webtheir weapons all begin to turn red, and, struck with thoughts of his brother, kokushibo marvel at how the demon slayers who came after them have risen up to surpass them.