Reisen

A moon rabbit who appeared in chapter two of Silent Sinner in Blue. She fled the moon to Gensokyo, but was ordered by Eirin to return to the moon with a letter. An unexpected fate awaited her upon her return to the moon ... ... According to Yorihime, "She doesn't have much sense about her, and she seems a bit dull; I worry about her." (Translation taken from Touhou Wiki; Profile on 東方儚月抄 official website)