The kindred souls are the head honchos...kinda. They reshape cats before they are born, while others chill in the golden meadows, playing without pain or tiredness.
Unborn souls play with those who have lived. Ancestors shape light blue balls of fluff into new lives. They choose their queens, but their memories are erased upon birth.
Cats whose lives were taken too abruptly to be judged. They are aloof or sorrowful, trapped in the Grey Swamp where only wails and sobs can be heard.
The rotten flesh (aka: the sooted souls) are cats who have done awful deeds. While some among them are powerful enough to ruin a new soul or put a curse on them, the reality of the realm is much more complex.
Additional Information: Some sooted souls can be really nice, because crimes don't determine personalities. Everyone is nice to each other; others may be mad, but no one holds grudges. Yes, there is beef, but not for long.