poppet
noun [ C ] UK informal uk/ˈpɒp.ɪt/ us/ˈpɑː.pɪt/
宝贝，乖乖
a person, especially a child, that you like or love
[ as form of address ] Come on, poppet, it's time for bed. 来，乖乖，该睡觉了。
Oh, Becky's a real poppet - such a sweet girl. 哦，贝姬可真是个乖宝宝——这么可爱的女孩子。