First off, ask yourself if you really want any roosters? Unless you're free-ranging or you want to breed your own chickens you really don't need any.
If you have any small children (under the age of 12), I'd strongly recommend against having roosters. The antics of small children tend to freak them out, which will make your flock stressed out and may preciptate an attack if the rooster is in the more aggressive / protective end of the spectrum.
Cockerels are very low maintenance until their hormones kick in . What happens next depends on how you integrate them. If you keep them with the lone pullet, she will probably get beaten up. Both of them will try to mate her whether she wants it or not, and pullets that age will either only run away or submit.
It's a little better if you have them integrated with the mature hens by this time, as the older hens will usually beat good manners into the boys.
From my experience you're probably going to have to re-home or cull one of them in the long run. With that low a hen-to-rooster ratio even mature roosters will tend to over-mate the hens and spar with each other frequently. I've heard of people getting away with as few as 2 hens per rooster, but in my experience with a free-range flock it seems like 5 is the minimum for relative harmony.
You also won't know exactly what you've got with a rooster until he's at least a year old. I've had some that stayed pretty consistent with temperament until maturity, and others that changed radically. In all cases they were quite a handful during their "tween" months (4 to 8 months old).