Humans

Literally just normal humans.

Absolute domination of the Playground. The most populous species by far, the most social, forming massive cities and nations, the top 100 most populous cities are human, except for a few international with massive number of other species in them, and one major city, the 5th largest, being the capital of the World Union.

Catgirls and catboys are a race of human with cat ears, whiskers, and are well known, a major drawback of being one is the being an obligate carnivore, unable to eat as much as the omnivorous rest of the hominids.