It comes down to genetics and having a fast metabolism. Some people are just skinnier than others. She does snack very often as well, though it seems like she's pretty active as been said. Literally nothing out of the ordinary with Grace. I have noticed occasionally someone will comment that if they ate like she did they would gain weight very quickly, which I think is cause for concern because though she often has baked goods and sweets, it isn't like she's overeating them, she eats more than I would but again it's not like a binge. Comments like that shaming people for eating similarly to Grace are what can set off an ED, imo.