- Japanese Voice Actor: Daiki Yamashita
- English Voice Actor: Kyle McCarley
- Age: 35+
- Manga Debut: Chapter 14
- Anime Debut: Season 1 Episode 8
- Race: Demon
- Gender: Male
- Status: Alive
Just like any other demon, Yushiro was once human too. He was under the care of Tamayo while she was a medical practitioner. He was frail and fighting a deadly disease when Tamayo made him choose between dying and becoming a demon.
Yushiro chose to become a demon and became the bodyguard of Tamayo. He had always expressed his adoration for her since then. He also acts as her bodyguard.
Yushiro first met Tanjiro when the latter had to venture to Asakusa, Tokyo, to track down a demon disturbance in the area. Being a village boy, the big city of Tokyo is something new to him. While in the middle of the crowd, he notices a familiar scent.
As he rushed to the crowded streets, Muzan was masquerading as a human with his family. Muzan escaped from Tanjiro by transforming on human into a demon. With all this commotion, Tamayo and Yushiro noticed Tanjiro.
After the situation had calmed down, they brought Tanjiro to their secret house. Yushiro was the one who led Tanjiro to the clinic of Tamayo. Tamayo, a demon Doctor, was treating her patients. Yushiro, her assistant, is helping her. They had been planning to eliminate Muzan for a long time. Tanjiro asks Tamayo if she feels uncomfortable treating humans, and Yushiro hits him.
Tamayo reprimanded Yushiro for his attitude. Tamayo told Tanjiro that she was the one who turned Yushiro into a demon. Tanjiro, upon hearing this, asked Tamayo her age. Yushiro hit Tanjiro again and was scolded severely by Tamayo
He sent two of his followers, Susamaru and Yahaba, to bring him the head of Tanjiro. Tamayo, Yushiro, Tanjiro, and Nezuko discussed creating a cure for demons by studying the blood of Nezuko and other demons close to Muzan.
While the four are discussing, suddenly, two demons claiming to be part of the twelve Kizuki arrive. It was Yushiro who first noticed it. A ball flew in through the roof, and his head fell off. While Yushiro was regrowing his head, Tamayo was holding his body.
Tanjiro went on the fight the Arrow Demon, Yahaba. Yushiro and Nezuko went on to fight the Temari Demon, Susamaru. Tanjiro combined Water Breathing styles and defeated Yahaba, but he got exhausted. Yushiro and Nezuko were able to hold off Susamaru. Tamayo had to use a spell that triggered the curse inside the head of Susamaru, and he died.
During the battle at the Infinity Castle, Yushiro could control the Upper Moon 4. He used a talisman to cover her eyes and drilled his finger into her skull. He was able to control Nakime and the Infinity Castle.
He shifted the rooms of the castle to force Muzan and the Demon Slayers outside of the castle so Muzan would be exposed to sunlight. During the fight with Muzan, Yushiro used his blindfold so those who had talismans on them would be invisible and could freely attack Muzan.
Muzan realized that the reason why the demon slayers are not visible is because of the assistance of Tamayo. Muzan started lashing out, and Zenitsu, Inosuke, and Kanao were the first exposed.
Muzan eventually lost when he was exposed to sunlight. After the death of Muzan, Yushiro was the only demon left alive. He then spent his days painting an unknown woman.
Yushiro is a short man that gives the appearance of a small boy. He has pale skin and lavender-purple eyes. His hair is short and straight. It has colors that fade from dull and light green, and black. Yushiro wears a button-up collared shirt under an all-white haori and dark blue Seigo-Sendeheira styled hakama pants.
Yushiro looks down on everyone around him. He has a short temper and an arrogant attitude. He has a scowl and rarely smiles unless he talks about how he admires and adores Tamayo. When he spends time with Tamayo, he hates everyone who interrupts his time with her.
He hates people who get close to Tamayo, insult her, or express a little admiration for her. He feels insulted by being generalized with other demons. When Tanjiro said that all demons are bloodthirsty, he felt insulted and asked if all demons are like that.
The strength of Yushiro was never displayed in the series. Instead, his keen intellect and strategies are evident. Muzan could not control Yushiro. Tamayo created him, who Muzan cannot control, so Yushiro can also not be controlled.
When the Demon Slayers interrupted Muzan and could not concentrate on controlling other demons, Yushiro would control the demons.
Yushiro has his body altered through a surgical procedure so that he would need minimal human blood consumption and does not possess a drive to hunt humans. Being with Tamayo and working as her assistant and bodyguard, Yushiro learned medical skills from her.
His blood demon art is called blindfold, where he can easily hide living and non-living things. He was able to hide the entrance to the clinic of Tamayo as well as the people inside it.
He also used his Blood Demon Art during the Infinity Castle Arc to hide the presence of Demon Slayer from Muzan. During the battle, he also used mind control to control demons. He wrestled with Muzan, who could control the demons.
While the demon slayers were destroying Muzan and slowly losing control of the demons, Yushiro took advantage of this and fully controlled them. When the battle was over, one of his special skills, painting, was shown to the world when he became a famous painter.