The Mystery Spirit is a spirit which haunts Zen Toono.
Appearance[]
The spirit appears as a dark-coloured amalgamation of extremely distorted cat spirits.
Personality[]
The Mystery Spirit has no personality and follows Zen around mindlessly.
Biography[]
This spirit haunts Zen Toono. Whether this is out of animosity or attachment is unclear, as Zen establishes himself to be an extremely caring figure towards cats.
It is likely the appearance of the spirit reflects unpleasant life the cats had leading up to their death, with the exception of their presumed care by Zen.