Lol I’m about the same body weight as her and a ballerina and I’ll be going home and eating a cheeseburger after rehearsal. We look like that cause we workout but trust me my studio goes out and eats so much food together 😅
Don't underestimate how much she eats. If she trains full time every day, which she probably does, then you'd be surprised - most likely she eats more than you. Ballerinas who "can't eat much" won't have the energy to get through variations let alone full 1-2 hour performances.