Looks like a Maine Coon cat, they don’t back down, they are pretty aloof and mostly very confident of almost anything.
And they always win in a catfight.
Looks like it might have some Russian or other kind of Blue in it. They’re smart little killers. I have one and you can’t “play” with it because one toss of the string or toy and it’s already got it floored with its claws. And it knows to go for the source of the string waving - your hand.
I don’t think any animal knows what size it actually is. I had a toy fox terrier terrify my 300lb mastiff, those 4 chihuahuas cornered that mountain lion in the garage, this cat runs off two alligators.
I’ve had 3 lb hens kick my ass when trying to put feed and water near their brood, tiny hornets terrorize me until either a cap or a spray of raid evens it up, I’ve seen bluejays and mockingbirds beat the ***t out of big cats.
Guess it’s all in the attitude.
I think it is a Maine Coon Cat. I have one and I can tell you that those gators are lucky they weren’t gutted after some play time.