Webone night, muzan kibutsuji confronted rui, who then tried to rescue him and converted him into a demon. Now possessing a strong body rui was finally able to move about. Webwhen rui became a demon, he was glad about being able to walk but realized he could never see the sun again. Soon, rui killed a man out of hunger. When his parents came. A very short introduction considers a process which transformed europe and left an indelible mark on the modern world — one that began as. Webspecifically taking the form of a spider demon gave rui some heightened senses, but also left him at a disadvantage in some cases. Rui’s presence leaves an indelible mark on the heroes, challenging them to confront their fears and strive for greater strength. Webdespite his monstrous exterior, rui’s story evokes a sense of sympathy, shedding light on the tragic consequences of his transformation into a demon. Dive into 'demon slayer:. Webrui's lower five rank is engraved into his left eye, a painful procedure that all of the moons had to undertake when muzan created them. The interesting part is that the lower. Webthe greatest demon lord in all history, varvatos, has reigned for several millennia as absolute ruler. Now, there's only one thing left for him to do… enjoy the life of an. Webrui’s transformation into a demon—a creature of both immense power and unimaginable loneliness—mirrors the cruel injustices he endured. It’s a testament to the series’.