When Madotsuki enters the area, it is randomly found in one of three positions on the rooftop.
It is commonly seen sitting atop the door well or on the rooftop air conditioners on the left, but there is a 1 in 64 chance that it may be found to the right of the doorway on the floor.
It doesn't move around when Madotsuki is in the area, but every 20 seconds or so it will wash itself with its tongue.
It makes a meowing noise when interacted with, but only when it can be reached on the floor level.
- When the knife is held, its red eyes turn white.
- In traditional western folklore, black cats are associated with witches. This is a subtle clue given by KIKIYAMA that the Witch effect has a special function in the area; namely the Witch's flight event.
- It can also be speculated that it is inspired by the witch partner cat Jiji in the Studio Ghibli animation Kiki's Delivery Service.
- The Black Cat has the same chance of appearing to the right of the doorway as the Uboa event happening - they both have a 1 in 64 chance.