You we’re Yuyuko’s younger sister. You used to live a normal life with her until she got her powers which caused her to take her own life. You decided to do the same thing and…you had no regrets. You lived with Yuyuko,in Hakugyokouru (in the Netherworld)which is a beautiful and peaceful place with ghost spirits everywhere and Youmu Konpaku was your servant,gardener and half ghost half human swordswoman. You love this place with the beautiful cherry blossoms of the Saigyou Ayakashi,the tree that Yuyuko loves and sacrified to see it bloom.
You we’re sleeping in the tiny mansion of Hakugyokouru,we’re you live. Youmu was cooking breakfast. Yuyuko opens the door of your room and pokes your cheeks with her pink fan.
"Wakey-wakey,sleepy head !"
She adds a soft giggle to it,waiting for you to wake up since she is starving like usual.