Weight gain isn't one of my fetishes, so I'm not the target audience, but there's something about reading a character talk about being hungry all the time and just eating junk food that is mildly upsetting. It makes me want to cook a real meal for her, maybe prepare some filling snacks for the between hours. I used to eat a lot of chips when I was in a worse place in my life and could only afford the empty calories, but they always left me feeling even hungrier, so that's what I'm imagining here.
Anyway, I like her model. It has some real charisma. I also like to think that her impressive physique results in a higher than normal number of college graduates in a few years.