Tristian just take her with you and teach her the modern of living then caution her not to show or tell anyone about herself and if necesarry give her a name apart from Zheng-Zheng.
kinda funny ..if i were Tristan i would faint to see such abnormalities ...but for the innocent ZZ...he did the right thing..that is...not afraid of her..and not having malicious thought like using her for her powers maybe...to do the bad thing