In this answer I'm assuming that your cat has an adequate appetite for dry food, and you're just trying to get her to transition to wet food. If your cat has a generally low appetite, please see this answer on the dangers of feline anorexia and take your cat to the vet!
Dry food is so appealing because cat food manufacturers use animal digest on it. One common way to get cats to transition from dry food to wet food is to put FortiFlora on the food. FortiFlora is a probiotic that is flavored with animal digest.
Some cats like parmesean cheese, so you could try a bit of that.
You could also grind up some dry food and sprinkle it on the wet food.
Another way to make wet food more appealing is to stimulate your cat's appetite. Cats naturally follow a hunt-eat-groom-sleep cycle, and you can use this to your advantage. If you play with your cat with an interactive wand toy, or throw a small amount of kibble for her to chase down and eat. After the play session, feed her wet food immediately. She will naturally want to eat it.
In addition, some cats do better when fed alone away from the noise of the other cats, so try feeding her in a seperate room for a while (on the other hand, some cats are encouraged by watching others eat the wet food, it just depends on your cat's personality).
Finally, some cats can smell that there's dry food available in the house and will wait for it. In these cases you may need to store the dry food in the fridgerator so they can't smell it anymore.