Voice - Medium, smooth

(I don't know how exactly to explain it, but when she puts emphasis on things her voice sort of goes to the back of her throat and sort of sounds like she growling?? Kind of like how some singers (mostly like jazz or RnB singers), when they are sort of putting emphasis on something theyre singing and they sort of put in a growl? sort of like this?? https://youtu.be/4hNpxi0N-2U?t=41 Idk I need help with this sort of thing! Im just used to calling it a growl since I've been using Vocaloid 4 for a little bit, and the growl is one of the featuress,,,, If you know the word for it please tell me!!)