Dai Ryusaki

Dai Ryusaki
Biographical information
Died	22 June 1691 England
Nationality	Japanese
Title(s)	Professor
Physical information
Species	Human
Gender	Male
Affiliation
Occupation	Professor at Mahoutokoro
Loyalty	Mahoutokoro

"Legend has it that Dai Ryusaki created a mind-enhancing potion that was super powerful... The potion was deemed dangerous, so Ryusaki was arrested and the potion destroyed! Rumour has it that, before he arrested, Ryusaki was able to hide a Dark Scroll with the potion ingredients. To this day, though, no one knows if the Dark Scroll actually exists... or what its contents may be!"

— Corey Hayden regarding the "Legend of Dai Ryusaki and the Dark Scroll"

Professor Dai Ryusaki (d. 22 June 1691) was a Japanese wizard who lived hundreds of years prior to the 20th century. He was known to have held a teaching post at Mahoutokoro. He was incorrectly thought to have been a Dark wizard. Ryusaki's life was briefly covered in a book on the history of Mahoutokoro found in the Restricted Section of the Hogwarts Library.

Biography

Dai Ryusaki was a professor at Mahoutokoro centuries ago.

During his life, he invented the Crown of Mneme, an incredibly powerful and dangerous magical item. He intended for it to be a medical device to relieve people of traumatic memories. He detailed his lifetime work in written documents, where he expressed his fear that the device could destroy the entire wizarding world, despite it being made to help. The British Ministry of Magic Archivist Elton Elderberry was aware of his connection to the Crown of Mneme, as he was one the Hit Wizards involved in his later capture, something about which he felt deeply ashamed.

Legend had it that Ryusaki created a powerful weapon (the Crown of Mneme), but it was not known what it was, as the information of it died with his death. It was also said that he created a mind-enhancing potion that was highly powerful.

Due to a miscommunication, the International Confederation of Wizards ordered Ryusaki to be captured, sending Hit Wizards after him to arrest him. Upon his capture, he had many personal items confiscated, including at least nine rings (two of which were made of solid jade) and an amulet which he was wearing when he died. The mind-enhancing potion was deemed dangerous and destroyed. Rumour had it that before he was arrested, he was able to hide a Dark Scroll with the potion ingredients. He was executed in England, supposedly on a rainy day (according to Elton Elderberry). Ryusaki was not a Dark wizard, but the wizarding community falsely labelled him one after his death to cover up their embarassment over his wrongful execution. His date of death was 22 June 1691, making 1991 the 300th anniversary of his death.

After his death, he was depicted in a portrait wearing his amulet which was kept in the Ministry of Magic Archives.

Magical abilities and skills

• Magical device invention: Ryusaki invented the Crown of Mneme during his lifetime, with the intention of having it help people with traumatic memories. However, it became too powerful and dangerous to use.
• Potions: Legend had it that Ryusaki invented an incredibly powerful mind-enhancing potion that was destroyed due to it being too dangerous.

Appearances

• Harry Potter: Hogwarts Mystery (First mentioned)