According to the wiki, "Zera was a bratty young girl who was claimed by her father to be very bright for her age. She had a mean streak to her personality, not being past putting down others by calling her classmates stupid and stating that Mavis was a gross germ; however, she was also seen to be aware of her actions towards others, and was willing to make up with and befriend Mavis."

I want to keep that, since I feel that Zera was a bit more nice then I'd think. I think she should keep her snarky side alive, and maybe a bit more snooty. I know that she'll be a bit rough around the edges, but generally do her best to support Mavis.