A fat, purple, 10 ft tall bipedal cat who represents depression and makes people feel sad and unmotivated

Kitty is sassy, charming and manipulative, convincing others to do what she wants by sweet-talking them into it. Whenever somebody is feeling down or upset, the Depression Kitty fuels their misery by convincing them that they're right to feel so upset about whatever situation they're in and trying to make them feel safe and comfortable in wallowing in their own misery.