I have two Silver Sebright roos, one Silver Sebright hen and one Golden Sebright hen. The two roos can be obnoxious, as they believe they are much bigger than they really are, and they fiercely protect their hens. In my flock, that's not just the two Sebright hens, but all the LF hens too. All of 'em. There is a dominant LF rooster, but if he's not around, the two Sebright boys don't want you anywhere near the hens.
They attack visitor's ankles, flogging them with surprising strength.
The hens are SWEET! My silver, Alice, is currently broody. She's sharing a covered kitty litter box nest with a LF broody hen.