Yuyuko Saigyouji is a ghost from Touhou Project, who first appeared as the final boss of Perfect Cherry Blossom.
A carefree, cheerful and often friendly individual, Yuyuko originally lived as a human over 1000 years ago. As she grew older and more mature, so did her power to invoke death in mortals. During this time, she met and befriended the youkai Yukari Yakumo. Ultimately, Yuyuko became so tormented by her own power that it drove her to commit suicide. Yuyuko's body was then used to place a permanent seal on the demon cherry blossom tree known as Saigyou Ayakashi, a ritual that had the unintentional side effect of forcing Yuyuko's ghost to retain a humanoid form as well as preventing Yuyuko from both ascending to heaven and falling to hell. Although Yuyuko eventually forgot her memories of her mortal life, including how she had died, she continued to remain close friends with Yukari ever since. 1000 years after her death, Yuyuko came across an old record regarding the Saigyou Ayakashi's inability to bloom, detailing the events of how Yuyuko's body was used to seal it and that causing the tree to bloom would result in her resurrection, though does not mention her by name. Completely unaware of the fact that it was her own body that was sealing the Saigyou Ayakashi, Yuyuko becomes determined to meet "this person" and seeks Yukari's assistance as well as that of her gardener, Youmu Konpaku, to steal the essence of Gensokyo's Spring season to force the Saigyou Ayakashi to bloom once more.
- Kurogane's Version
- RicePigeon's Version
- Seravy's Version