My roomate has done everything she could to kill this plant. Please help me save it, if at all possible, with an ID and diagnosis. It has been getting limited, but direct sun next to a desert window. It might have been watered once.
you have a very sad gerbera daisy, its not really worth keeping ( in my opinion) once they are finished flowering they are very dificult to make re-bloom. Also they are prone to aphids and powdery mildew indoors. They are easily replaced, but if you heart is set on saving it I suggest putting it outdoors, if its warm where you live. Or keep it moist at all times and give it some fertillizer it looks chlorotic ( lack of nutrients)
Surely Gerbera is wilting, but whether it is a dry wilt or wet wilt, can not be judged from pictures.
It's not just wilting, it's dying. The soil looks moist. You could get additional clues by tipping the pot over upside down and removing it form the root ball. You should be able to inspect the condition of the roots. The roots should be healthy looking with young white/cream/pale roots. If all you see are dark brown roots, it is possible that it has been fatally overwatered. I agree, in most cool temperate climates where it can't survive outdoors, it's not worthwhile keeping. We treat them like we would cut flowers - once the best of the flowers are gone, they go into the compost heap.