Eirin Yagokoro

Eirin Yagokoro is a Touhou Project character that makes her debut in Imperishable Night as one of two final stage bosses alongside Kaguya Houraisan. She is a Moon medicine genius, capable of creating the Hourai Elixir. She is in exile in Gensokyo after deciding to stay with and commit herself to Kaguya Houraisan on Earth rather than return to the Moon. She was a well-known personality on the Moon, not only for her role in the formation of Lunar civilization with Lord Tsukuyomi, but also as the Moon's leading medical intellect and the person in charge of the Moon's messengers to Earth.

It appears that Eirin is now employing her medical expertise to serve as Gensokyo's top pharmacist, offering medications at Eientei that range from sleep aids to other remedies. She generally has a good disposition and is committed to helping her best friend Kaguya, but because of her incredibly high intelligence, she can occasionally come off as conceited, impatient, and condescending to those who are not quick enough to understand her explanations.

The Hourai Elixir, an elixir that offers true immortality, is one of her most noteworthy creations. Eirin is distinguished for her knowledge, ageless beauty, and serene disposition. Eirin Yagokoro plays an important role in several storylines throughout the series, primarily because of her medical knowledge and lunar background. She can manufacture or generate several types of medicine, such as ointments, tablets, elixirs, serums, creams, and powders. These medications could be used to treat or prevent a variety of ailments, as well as for healing and pain relief.

Anime: Touhou Project