Neutral Dead
These are the dead who don't qualify to join StarClan or the Dark Forest.
Non-clan cats who die may linger as ghosts in the living world. They may lack part of their memories or intelligence, and they usually reincarnate once their purpose is complete.
Non-clan cats who don't become ghosts go to the unknown residence, where they wander until they fade and reincarnate.
These spirits have faded away and rejoined the cycle of reincarnation.