cats getting along

i have another cat that was there before my kitten ebony and misty the other one thinks shes the owner of the house and is the boss of the hpuse to so in order for them to get along you have to place them in a room together but inorder for them not to fight stay in the room with them and if they hiss and growl that is fine they are talking to eachother and now ebony and misty are kinda getting along more but they still kinda hate eachother