Reisen Udongein Inaba (鈴仙・優曇華院・イナバ?)
Species: Moon rabbit
Ability: Manipulation of lunacy
Residence: Eientei
Theme Song: Lunatic Eyes ~ Invisible Full Moon
Stage 5 boss and playable character in Touhou 9, as well as 10.5 and 12.3. A moon rabbit, she came to Gensokyo about 30 years ago to escape a war between the Earth and the Moon. Since then, she has been an apprentice to Eirin, a pet to Kaguya, and a caretaker to Tewi. She has the power to drive people mad with her eyes — mainly in the form of hallucinations — as well as communicate telepathically with her kind. She also has control over waves of all kinds, such as light waves, brainwaves, electromagnetic waves, as well as sound waves, demonstrated during her story in Phantasmagoria of Flower View. "Udongein" and "Inaba" are both nicknames, the first given her by Eirin and the second Kaguya; the latter is what Kaguya calls all rabbits. Despite her power over insanity, Reisen is portrayed as one of the most level-headed and serious characters in the series.
Since her bullets look like suppositories, this makes her a minor joke character. Also according to a series of yonkoma comics approved by ZUN entitled Inaba of The Moon and Inaba of The Earth, despite the care she generally got, Reisen is often abused by her mistress Kaguya and teacher Eirin, mostly by knocking her out for a long time or subjecting her through 'punishment times'. She is also often the subject of many pranks made by Tewi.
