Aether's Kingdom!

Kemiji, the Ghostly Wishmaker

A devious ghost, Kemiji is a spirit that wishes for nothing more than to be summoned and grant the wishes of whoever brings him into the mortal plane.
Of course, he is prone to leaving out the fact that summoning him comes with a great cost: being granted one thing requires losing another.
Capable of granting almost anything that he wishes, Kemiji is equally capable of taking anything he wants - a favourite of his being taking away the summoner's autonomy.
He's only capable of removing something of equal value that he has given, though that in itself is quite subjective..
LWhen he isn't summoned, he resides in a subspace of sorts.
The subspace consists of the inside of a one-story house, with everything that entails. He doesn't sleep.
When Kemiji isn't bothering some summoner, he's busy messing around in his subspace. He often partakes in creative endeavours. He likes shaping the souls of particularly ambitious summoners into different shapes for display.