It is cell shading basically if you want to got with the finite traditional way. Cell shading is pretty much animation that is animate on cells, hence cell shading.
There is a bit of a tweak though that isn't traditional, which is the gradinets. I don't think in old cell animations, blurry or gradients in a shading isn't possible, unless its for like ilustration purposes.
It would normally fall under cartooning and especially anime, but its hard to determine what else. Then again visually, the proportions look close to what they would use in concept art. Rarely I see anime using a smaller head like that used in anime. Some games like phonix wright, kingdom hearts, but color wise is not even close. Im pretty sure if you look at alot of pixv, you'll bound to find something simular. Or even anipan has a bunch of anime stuff.
You could also try piling thorough my watches and faves. ALot of anime stuff there.
It falls under the big,big umbrella of cartooning. The way the lines are used and the expression reminds me of Kenichi Yoshida. [link] Yoshida seems inspired by European cartoonists, a trait he shares with both Hayao Miazaki and Naoki Urasawa.
You might also want to check out Capcom artists like Kinu Nishimura (Street Fighter, 999, Code of Princess). She has a similar kind of dynamic, yet light expression and sweet use of line and color. [link]
Thank you, this helps me quite a lot. I am beginning to see more of an area of diverse styles that I am very interested in, rather than one particular style. This gives me a huge jump on researching my influences and diving deeper into the things that inspire me. So again, thanks!