So I adopted a very cool haunted doll character (or a Hinnagami) from Kimchi on TH. (original design by them and can be found here- https://toyhou.se/26438343.junko-hinnagami )

I took the time to do a quick sketch of what her human/ghost form would look like, since Hinnagami are ghosts that reside in dolls.
This lovely Yokai will grant wishes, but it is highly recommended that you never make any. . .any wishes granted will mean that you must always make another. Even in death, a Hinnagami will haunt the person who they granted wishes to. They are meant to ward against greed.

Junko actively discourages people, the few she meets, to not wish for anything. Despite being a Yokai who can cause suffering, she is a gentle spirit. If shown kindness, she will offer it in return.