What a beautiful girl. Got to love the Main Coons.
I agree with Donna. There may be some hissing, we still have some, but along as there's no blood your OK.
After 2 years Bailey and Chessie still DO NOT like each other. They will hiss, spit and swat. If they had nails we would have blood all over, but they happen to be 2 of the 3 de-claws we have.
It's funny to watch since both are mom's boys, she will have one on the arm of her chair and the other on the opposite arm, every thing is fine until one spots the other, then the hissing begins. She just has to grab one and hold him with his back to the other, then things quiet down again.
So love her and have fun.