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鈴仙・優曇華院・イナバ(れいせん・うどんげいん・イナバ) (♫)
Reisen Udongein Inaba


Moon rabbit


Lunacy-inducing eyes, telepathy with other moon rabbits, manipulation of wavelengths


Unknown, at least 38 years old


Kaguya's pet, Eirin's student, medicine seller.




  • (Touhou 10.5) Same as Touhou 9, but is wearing a short sleeve white shirt, a red belt, and a blue skirt.
  • (Touhou 10.5, alternate outfit) Same as above, except her dress, her ears and eyes are both dark green, and shirt and hair are light green.
  • (Touhou 9) Red eyes, long light-purple hair and long rumpled rabbit ears. Dresses in a white shirt with a red necktie. There is a clip on her necktie in the shape of a carrot. Wears a purple skirt.
  • (Touhou 9, alternative outfit) Same as above, except her shirt is black and her tie is yellow.
  • (Touhou 8) Same as Touhou 9, but with a black business suit over her shirt. Her left suit-collar is decorated with a crescent moon-shaped insignia, and there appears to be paper or business cards poking out of her left shirt pocket. Wears a beige skirt.




See Character Titles

Reisen is one of the legendary lunar rabbits; she fled from the Moon to Earth as a refugee from the "Lunar War" between the two worlds that began in 1969 A.D. after the Apollo 11 "invasion". Making her way to Gensokyo she was surprised to meet the notorious fugitives Kaguya and Eirin, and asked for asylum in Eientei. In exchange, she works for and protects Kaguya and Eirin.

During Imperishable Night Reisen hid within Eientei to avoid any lunar emissaries that might arrive on Earth and force her to return to the Moon. She was tasked with sealing the doors inside Eientei to ensure that Kaguya could not be found by the emissaries either. She used her power of insanity to stop the heroines from invading Eientei, but was defeated. Reisen's power of insanity comes from her eyes; she uses them to refract and twist waves, disorienting and confusing her victims and deceiving them with frightening illusions.

Perhaps ironically given her insanity-inducing powers, Reisen seems to have one of the more stable and balanced personalities in Gensokyo. In Phantasmagoria of Flower View she worries about Tewi running off and seems more level headed than most other characters. Although she doesn't know what's causing the flower incident, she's decided to investigate by going wherever the flowers are blooming.

During the events in Scarlet Weather Rhapsody she appears in the Scarlet Devil Mansion to ask questions but is beaten by the furious Mistress. Later she inquires into the fate of the Hakurei Shrine and asks if the earthquakes are still going on. Failing to find clues, she later goes to Hakugyokurou to check its condition and to ask Yuyuko about the Shrine's destruction. She tells her about the "completion ceremony" of the new shrine, but when she goes there, the shrine is destroyed. She also meets Yukari, who forbids her to investigate the shrine. Some time after the battle with Yukari, Tenshi suddenly appears and tells Reisen that earthquakes are just "fine".

Also, in Silent Sinner in Blue, her previous owners, the Watatsuki sisters, named another Moon rabbit Reisen after her.

Fun Facts

  • Reisen's right hand is often depicted to be making a gun shape, which leads to fan assumption that she shoots danmaku in this manner, and she indeed does in SWR. Some fans even depict Reisen holding an actual handgun in artwork. Those are all based on ZUN's word that her normal shots were modeled after a bullet. The revelation in SSiB that all Moon Defense Corps Rabbits are drilled with rifles suggests that Reisen can also use the real thing.
  • "Inaba" is a nickname given to her by Kaguya (just like Tewi). Her real name, Reisen, is written in katakana, but in order to fit in with people on Earth, the kanji with the same pronunciation, 鈴仙, was used. The characters for Reisen literally mean something like "Bell wizard", and Udongein "House of plantain flowers.". Additionally, in Japanese "reisen" can mean "Cold War". This may implies the time that human exploration of the Moon started. (see also notes on Reisen's spellcards) while in Germany it means "travels" or "voyages" as well as "to travel". Another meaning for "rei-sen" is "Type-0", as in the Japanese Navy designation for the famous Mitsubishi A6M Zero fighter plane. This may be also a reference to Reisen's military background. (see also Imperishable Night: Music) A species of rabbit, called the Deutsche Riesen, may also be where her name comes from.
  • "Udonge", the short version of the nickname Eirin calls her by, translates to "plantain flower," whose buds look remotely like rabbit ears.
  • "Udongein",優曇華院 can be literally translated as House of plantain flowers, note that the character "院" (House) using in such circumstance is a vital part of Japanese Title system. In feudal Japanese society noble women would receive similar titles ended with "院" at their old age to indicate their worship to Buddhism. This title is similar to the Posthumous Name, 諡号 in order to commemorate a deceased person. In Reisen's case, "Udongein" was given by her master Eirin and this might probably a ritual practice to make Reisen forget her dark past and begin a new life on earth.
  • Some fans call her "Zayaku" (座薬, meaning 'suppository'), because her bullets look like them. Many, many jokes have been made about this, often of a crude nature. In addition, some species of plantains carry seeds that are useful for constipation and irritable bowel syndrome, similar to the functions of rectal suppositories.
  • Reisen's Imperishable Night outfit, with a long-sleeved dark suit jacket, tie and short skirt, is considerably more modern than most of the other characters' and resembles a private school uniform. In Phantasmagoria of Flower View, with her jacket doffed, she looks more like an office intern.
  • Reisen's rabbit ears, strangely, always have two accoutrement-like buttons on them. It looks like the ears were linked to Reisen's head by buttons. Many fans made fun of this and said Reisen's rabbit ears were artificial. However, Silent Sinner in Blue chapter 8 showed other rabbits in the Lunar Defense Corps for the first time, and they also have the same buttons on straight ears, unlike the floppy ears of "civilian" Earth and Moon rabbits.
  • Reisen's line "I'm just a useless little bunny, only good for my sex appeal," from the doujinshi "Drunkards in Eientei" by Omchicken, has become a popular meme associated with her.
  • Reisen's alternate outfit in Scarlet Weather Rhapsody and Touhou Hisoutensoku is a homage to the Vocaloid Miku Hatsune. Her other alternate outfits in Hisoutensoku are also homages to fellow Vocaloids Rin and Len Kagamine, Luka Megurine, Meiko, Kaito, Gakupo Kamui and Gumi.
  • Based on what Reisen says to Mystia and what Lyrica says to Reisen in Phantasmagoria of Flower View, it seems as if Reisen can also manipulate sound waves as well as light waves.

Official Profiles

Imperishable Night - キャラ設定.txt


 ○5面ボス 狂気の月の兎
  Reisen Udongein Inaba







Stage 5 Boss, Lunatic Moon Rabbit
Reisen Udongein Inaba

Species: Moon Rabbit
Abilities: Can make people insane with her eyes

A rabbit from the moon.
Her red eyes give her far greater power over insanity than Earth rabbits.

She is currently living as Kaguya's pet. Her name was originally written レイセン (pronounced Reisen), but it was changed to 鈴仙 (also pronounced Reisen) to better blend into Earth's civilization.

The other parts of her name are just nicknames. Eirin gave her her first nickname, "Udongein," and affectionately calls her "Udonge" most of the time. No one is certain why that nickname was given to her, especially since even Eirin doesn't call her by the full name Udongein. Moon people are hard to understand...

"Inaba" was later bestowed upon her by Kaguya because... well, that's what she calls all rabbits. Whenever Kaguya says Inaba, she could be referring to Reisen, Tewi, or the scores of other rabbits living in Eientei. It doesn't seem as though she ever bothered to make a distinction between them. All rabbits probably look the same to her.

Reisen is a fugitive from the moon, which is being invaded by Earth. More information about that is available in Kaguya's profile.

Phantasmagoria of Flower View - Manual

Th09reisen manual

 ○狂気の月の兎  鈴仙・優曇華院・イナバ(れいせん・うどんげいん・イナバ)

Lunatic Moon Rabbit
Reisen Udongein Inaba

A rabbit from the moon.

Her red eyes give her far greater power over insanity than Earth rabbits.

Flowers are blooming all over Gensokyo so the rabbits of Eientei went into an uproar. This couldn't be left uninvestigated, so she went out to find out about it. While she's at it, since Tewi disappeared, she's also going to bring her back if she can.

Phantasmagoria of Flower View - キャラ設定.txt

Th09reisen portrait

  Reisen Udongein Inaba




Lunatic Moon Rabbit
Reisen Udongein Inaba

Species: Moon Rabbit
Ability: Can make people insane with her eyes

A rabbit from the moon.

Her red eyes give her far greater power over insanity than Earth rabbits.

Flowers are blooming all over Gensokyo so the rabbits of Eientei went into an uproar. This couldn't be left uninvestigated, so she went out to find out about it. While she's at it, since Tewi disappeared, she's also going to bring her back if she can.

Scarlet Weather Rhapsody - おまけ.txt











 The Red Eyes of Madness
Reisen Udongein Inaba

Race: moon rabbit
Place of residence: Eientei
Ability: the power to control madness

   It's common knowledge that light is made of waves, but there's more to sight
   than just that.
   Space itself is waves, and the creatures, things, and of course, light in it are also all made of waves.

   Naturally, the thoughts and feelings of living things also consist of waves, and
   their wavelengths determine personalities.

   Reisen can control these waves.

   Short wavelengths induce madness, and long wavelengths induce an easygoing nature.
   And, if you completely invert the waves' phases ... she can completely disappear
   from her opponent's perception.

  Personality: both carefree and crazed. Is a different person in battle.

   Since she is not originally a creature of Earth, she isn't much like humans at all.
   She can change her personality completely to match her circumstances.

   She is not really very kind, and sometimes she can play dumb just as well as Reimu.

Book Synopsis

Bohemian Archive in Japanese Red

Main article: Article and Interview: Reisen

The Rabbit Horn League, led by Reisen, crash the Hakurei Shrine's annual banquet, though apparently with the intent of participating instead of making trouble. However, upon discovering the banquet's main dish is rabbit stew, they start a protest. A compromise is reached, but Aya's not entirely satisfied with the results. She and Reisen end up trading lightly veiled insults and threats for half the interview.

Perfect Memento in Strict Sense

PMiSS reisen
Main article: Perfect Memento: Reisen Udongein Inaba
  • Reisen does not attack humans; in fact, she seems to avoid them.
  • It is said looking directly into her eyes causes insanity.
  • Her ability of lunacy is achieved by manipulating wavelengths. Increasing wavelengths causes the target to become carefree, while decreasing wavelengths causes insanity.
  • Reisen can occasionally be seen selling medicine at the human village.

The Grimoire of Marisa

Main article: The Grimoire of Marisa: Reisen Udongein Inaba's Spell Cards
  • Insert Summary Here
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