Velvet

Velvet is a dark soul who possesses people giving the urge to kill no matter who it is she doesn't do anything she just gives the make the urge to kill, and they'll do it and the only way get to rid of it is to pass it to someone else by being actually friendly to someone and they get possessed and all characters from Experiments, Arthur, Carl The Collector, Paw Patrol, Peppa Pig, Bluey, Team Umizoomi, WordGirl, Hamster and Gretel, The PowerPuff Girls, Happy Tree Friends, South Park, Family Guy, SML all don't know what's happening and just have to find out for themselves