Reisen is a 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-wiki
Touhou Project: Reisen Papercraft