I'm not 100% sure yet, to be honest!
I wanted to change the way some of the housemates react to weight gain, and I chose Zoe since she seemed like the best choice. I've really liked how she adds more antagonistic energy to the dynamic, and I plan to keep her pretty resistant up until maybe the last stage or two where she comes to accept it with the MC, but she'll still keep up her aggressive personality with the others.