obstinate person

Oh yes, I know it's useless, but I'm an obstinate person and like my own way.

Dona, when she once took an idea into her head, was the most obstinate person in the world.

And yet, in some respects, she is the most obstinate person I ever came across.

I see that you are a very obstinate person when you have once got a notion into your head.

Hard mouthed un, any one difficult to deal with, a sharp bargainer, an obstinate person.