Maybe the reason Grimace was so terrible for basically 16 of its 21 chapters is that the author's true calling is writing quirky comedy/slice of life stuff and not sad attempts at whatever they think psychological thrillers are supposed to be.
Are we sure she's a black cat and not a void cat or something? No light escapes her fur as we cannot see any part of her face that has fur and is there fore black, kinda like a black hole, or the void.
Either way she is adorable.