Weird Cutesy Horror/shock series i saw when i was younger from youtube or either newgrounds

I remember this older, kind of newgrounds or youtube esc horror series which revolved around hello kitty..

in this series, Kitty was a secret, psychopathic sociopath who would kill off her neighbors and either mutilate them or sell them alive off to the black market. Thats really all i remember about this plot.

The 3rd or fourth episode i remember of that series (it was quite long) had a couple of these cute characters put in a humongous, rusty bloody cage for entertainment and with some of them having their limbs cut off so they cant properly run away. There were also i think zombies? just creatures trying to kill them, and i believe scientist windows watching from below as some sort of experiment on them?? i remember it faintly.

If this helps:
there was also this character that kind of looked like kuromi with fangs poking out from their mouth. and in a "christmas special", Kitty was killed and this kuromi esc character was left locked in a closet and went crazy due to the heavy amounts of trauma of seeing her friends die. and once the guards barged in and started searching, killed each and every one of those heavily armored guards with either long claws or a knife, might of been just her hands too (?) im very faint on my memory but it was something like that.
after killing some of the guards it just looked like kuromi but had red fur instead of white fur due to the blood.

I dont really remember too much about this. its very vivid as i saw this when i was around 5 or 6. I would really like to see this horrifyingly weird series again. I do believe this is 5 + years old. i rediscovered this from a random commentary video on youtube about this so it is very much findable again. (to my knowledge)