10 hens to one roo is a good number, usually that means little to no over mating. Orpingtons and roos in general are very much individuals, he will have his favorite girls but he will take care of them as a group too. Some roos are pretty laid back breeders and others are aggressive breeders...
ummmm yes Ruby is a boy...gonna be a handsome dude too.
I have tons of them that are spoiled rotten and 2 that, could they speak English, would tell you they are not chickens but they are people who wear funny feathery clothes. So, do not ever expect yours to be anything BUT spoiled, they...