Not to be confused with Reisen Udongein Inaba, Reisen is the Watatsuki sisters' pet in Silent Sinner in Blue, a manga spinoff of Touhou Project.
Named after Reisen Udongein Inaba. Sometimes referred to by fans as "Reisen II" (レイセン2号) to distinguish her from the original, but English-speaking fans also use the unofficial romanization "Rei’sen" with the an added apostrophe or alternatively the anglicized phonetic spelling "Reysen".
The following tags implicate this tag: reisen_(touhou_bougetsushou)_(bunny) (learn more).