Reisen Udongein Inaba is a legendary lunar rabbit from Touhou with the power to induce lunacy from her eyes, who 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 now works for and protects Kaguya and Eirin. She also has a relative named Tewi who is an earthborn rabbit. Perhaps ironically given her insanity-inducing powers, Reisen seems to have one of the more stable and balanced personalities in Gensokyo. Also, in Silent Sinner in Blue, her previous owners, the Watatsuki sisters, named another Moon rabbit Reisen after her.