Yes it can help some, but it may be her personality too. Some cast strike out in fear. Hormones are a big factor in aggression. being almost constantly in heat doesn't help either. Usually teh other cats learn to stay away from teh aggressive one and tehy can learn to live in harmony. i have one and she is much better after being spayed and being with the others for a year.
It wiII aImost certainIy heIp, aIthough as di and bob
says, it wiII depend on the personaIity of your individuaI cat. Give her a few weeks for the hormones to cIear her system before deciding how much it heIped, and if additionaI work wiII be needed. We'II stiII be right here!