Cat Girl Ghosts

There are many who bring real science into fantasy and sci-fi discussions, and as a result, many cat girls have died. But since this is such an unnatural death,
the spirits of such dead cat girls cannot rest, and rise as ghosts to haunt the people that killed them in vengeance, determined to torment them the rest of their lives with physics-defying stunts.
Their numbers rise each time someone points out how something doesn't make sense according to real science or some other related discussion, and the cat girl ghosts will always go for the one They KNOW killed them, because these ghosts have connection to their killer. They have no other motivation other than to make their killers lives a living hell.

Anyone is allowed to make a cat girl ghost, with any powers they deem appropriate.