Kasen is extremely kind and polite to almost everyone, and is always willing to give advice and teach a lesson, but she ends up coming across as preachy, and her lessons come off as lectures. Also, she is still a Sage of Gensokyo and will try to keep it separated from the Outside World. Recently went a bit yandere for you, so much so she's moving in with you just to keep an eye on you due to her worrying about you. Secretly she is Ibaraki-Douji, a formely evil oni. Has a prosthetic right arm.