愈史郎（ゆしろう）
from Demon Slayer: Kimetsu no Yaiba
Yushiro (愈ゆ史し郎ろう Yushirō?) is Lady Tamayo's traveling companion and a Demon created by her. He is also an ally of Tanjiro Kamado since encountering him in Asakusa, Tokyo. Yushiro has the appearance of a young boy with pale skin and bright lavender purple eyes. His short hair is neatly styled and vertically shaded from a dull green to black. Yushiro wears a button-up shirt under an all-white kimono and dark blue pants. Yushiro's only desire is to be by Lady Tamayo's side. Anyone who disturbs that is an inconvenience to Yushiro. Upon first meeting, Yushiro was rude to Tanjiro and called Nezuko an eyesore simply because they were interrupting his time with Tamayo. He often makes silent remarks about how beautiful Tamayo is and will do anything she says, as his only priorities are to protect her. Anyone who threatens Tamayo or their life together is an immediate enemy to Yushiro. This includes other demons like Muzan Kibutsuji and his followers. At first, Yushiro regretted allowing Tanjiro to compromise their hideout. Later on, however, Yushiro began to appreciate Tanjiro and Nezuko's strength and even admitted that Nezuko is beautiful. Some time ago, Yushiro fell sick with a terminal illness. He was watched over by his Doctor, Tamayo. She gave him the choice to live on as a demon but warned him the loss of his humanity would haunt him. Yushiro decided to allow himself to be turned into a demon and has pledged his loyalty to Tamayo ever since.
Demon Slayer: Kimetsu no Yaiba
Since ancient times, rumors have abounded of man-eating demons lurking in the woods. Because of this, the local townsfolk never venture outside at night. Legend has it that a demon slayer also roams the night, hunting down these bloodthirsty demons. For young Tanjirou, these rumors will soon to become his harsh reality... Ever since the death of his father, Tanjirou has taken it upon himself to support his family. Although their lives may be hardened by tragedy, they've found happiness. But that ephemeral warmth is shattered one day when Tanjirou finds his family slaughtered and the lone survivor, his sister Nezuko, turned into a demon. To his surprise, however, Nezuko still shows signs of human emotion and thought... Thus begins Tanjirou's quest to fight demons and turn his sister human again. (Source: VIZ Media)
