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Yumemi Okazaki

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(おか) (ざき)   (ゆめ) ()
o̞käzäki jɯᵝmemi
Yumemi Okazaki
Yumemi Okazaki
Yumemi Okazaki in Phantasmagoria of Dim.Dream
Fantasy Legend
More Character Titles

Human (not native to Gensokyo)


Artificial Magic






Probability Space Hypervessel, from the Outside World

Music Themes
Official Games

"That's right; I've finally found the beautiful power called 'magic' in this world. I won't settle for just observations anymore. I'm going to take you back as a test specimen, study that power, and then make it mine!!"
Yumemi Okazaki to Reimu (Phantasmagoria of Dim.Dream)

Yumemi Okazaki (岡崎 夢美 Okazaki Yumemi) is a college professor searching for the mysterious power of magic so that she can study it and bring her findings back to the scientific community. When she arrives in Gensokyo, her ship, the Probability Space Hypervessel, is mistaken for some ordinary ruins by the inhabitants. She attempts to kidnap the heroine to use her as a research subject, but is ultimately defeated and sent home empty-handed. Yumemi is unfamiliar with both the magical and religious matters of Gensokyo, so she refers to Reimu Hakurei's power as magic, even when Reimu insists that it's actually divine power.

It is implied that her world of origin may not be the outside world as we know it, due to her profile and that of Chiyuri's, which suggests that a grand unified theory has been established, and there are 13 year-olds graduating from graduate school. Of note, however, is that in Magical Astronomy, which takes place in the future of the outside world, Maribel mentions that gravity was unified with the other forces recently, which could mean the grand unified theory has been established in the outside world.

Character Design


Her full name is Yumemi Okazaki (岡崎 夢美). "Yumemi" means "beautiful dream", and "Okazaki" is a common Japanese surname meaning "mountain".

Her name may be inspired from not one, or two, but three characters - Yumimi Yoshizawa (Yumimi Mix), Sayori Okajima (Sayori na Parallel) and Marian Ezaki (Apple Paradise). Additionally, her last name may be a reference to Japanese biologist Reiji Okazaki, or the Okazaki Enzyme.


Yumemi's design shows that she has red eyes and dark red hair, with a matching dark red cape, vest, cloth shoulders and skirt. She also has a white shirt and bright red bow tie. Her alternate outfit is the same, except her hair is blond and her eyes are yellow, her dress and cape is black with purple trimmings on her dress and the cloths on her shoulders as well. Her cape has a red trim and her bow is red, but when she is casting a special attack, her bow tie is purple instead.


Phantasmagoria of Dim.Dream
Yumemi's sprite in PoDD

In Phantasmagoria of Dim.Dream, she is the final enemy the player encounters. Because Chiyuri was spreading misinformation, Yumemi promises to grant the player a wish should they win, both out of confidence and apologies for her assistant's behavior. When she loses, she nearly pulls out a bomb powerful enough to destroy the entire world, but is stopped by Chiyuri. She then proceeds to grant the player's wish.

In Yumemi's own story, after successfully defeating all other opponents, she comes inside the Probability Space Hypervessel, only to almost be attacked by Chiyuri; after reprimanding her for this, they are then approached by a third individual -- a clone of Yumemi created by Chiyuri while she was messing with the ship's controls. After punishing Chiyuri again, Yumemi then engages in a battle for superiority with her clone that she wins.

After all the events of Phantasmagoria of Dim.Dream have ended, Yumemi is kicked out of the university she taught at for presenting a theory of magic. Yumemi and Chiyuri then return to Gensokyo, and it is implied that they are still there.


Chiyuri Kitashirakawa

Chiyuri Kitashirakawa is an assistant of Yumemi.

Minor Relationships


Ruukoto is a former maid of Yumemi and is Yumemi's creation. She is now owned by Reimu Hakurei in the PC-98. It's unknown if Reimu owns her in current Touhou Project.


Mimi-chan is a weapon and a creation of Yumemi's. She is now owned by Marisa Kirisame in the PC-98. It's unknown if Marisa owns her in current Touhou Project.




Additional Information

  • Yumemi appears on the cover of Phantasmagoria of Dim.Dream along with all the other characters in that game.
  • She's one of the few PC-98 characters who has a full in-game portrait, which appears when she is casting a special attack.
  • She is one of the two final bosses who is a human, along with Sumireko Usami. Yumemi however is the only final boss without any kind of innate power or magic.


Official Profiles

Yumemi OkazakiAlternate outfit  ★ 夢幻伝説       ・・・ 岡崎 夢美



★ Fantasy legend ... Okazaki Yumemi

She teaches comparative physics at a university. She doesn't look like it, but she's already 18, which is quite young to be a professor. In Yumemi's world, all the forces such as gravity, electromagnetism, and atomic power have been resolved under a unified theory, which has been proven to explain all known forces in the world. Yumemi believes there may be a force that doesn't fit in this theory - "magic". However, when she announced her theory to the academic community, she became a laughing stock.

Yumemi came to this world to get even with the academy, but...

Official Sources

Official sources