Clarify what you mean by demi humans?

Demi humans is a creature that has a combination of parts of a human and a different creature. Like centaurs for example.

How is that a single race? That describes 90% of mythical and folkloric monsters

Well...yes...but it's the name of a category for the creatures that are classified as a subspecies of humanoids

A fictional category for mythical beings. The term demi human only appears in works of fiction.

Demi human is usually known to anime girls as Raphtalia from Shield Hero.

Ew...

I especially like the ones with big breasts.

Bro, please stop, your posting cringe, you're going to lose subscriber

Right, right. I'm just kidding, I wanted to see your reaction XD