Besides the fact that she herself is one-dimensionalThere is not a single characteristic that she shares with this one dimensional caricature of a gay teenager.
But you're right. It's purely for aesthetic. There have been a few cases where her character choices maybe matches one or two of her traits, but for the majority of the time, it's just what she WANTS to be. She always chooses the most appealing characters out of the cast in a series (oftentimes a protagonist or some sort of fanservice-y character) because her deepest desire is to be effortlessly loved by many.


However when it came to actually working out and making long-period changes to her diet, those feelings of "bawww I'm so fat and ugly" seem to disappear. In fact, aside from her mentioning working out last year in June and this year in March, I have not seen her talk about her weight loss at all
Oh well, none of her followers have ever asked about it, so I'm sure no one will question or even notice her unusual eating habits
On a final note, here's another rare moment of Heather being self-aware
















