Nopperabou Ghost ("nopperabou" is the common Japanese name for creatures without a face) looks like a typical ghost but without a face. The Nopperabou Effect can be obtained by interacting with it. It can be found in The Sewers.
- The Nopperabou Ghost pays high resemblance to Fleebie and Follony, as well a resemblance to Youmu's phantom half and the PC-98 Bakebake (only minus the face and head piece) from the Touhou Project.
- As soon as Madotsuki has the Knife Effect equipped, the ghost starts fleeing from her.
- In YUMENIKKI –DREAM DIARY–, an entire swarm of what appears to be Nopperabou Ghosts can be seen floating by the lighthouse in the Pier World and circling above Poniko's House. The later added Sewer also features a stationary one.
- The Nopperabou Ghost was originally more lightly shaded prior to version 0.10.
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