What makes up this Style?

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I’ve been looking at these paintings and was wondering if there is anything you guys can see that I can’t?
What are the main elements that make up these paintings? Is it the lines? The shapes? The composition?
What would one look into, besides studying these painting (I already am), to understand and steal the style?

Guys name is Justin Gerard, traditional painter.
https://justingerardillustration.artstation.com/