Your welcome!
Yep, the little girl is Pinky. Pinky is so good at acting twins so she should play a twin lakorn. She's also a good actress even at a little age.
Pinky's childhood drama. The only one I remember is this one and Dao Pra Sook where she plays the little version of na'ek. Sadly she doesn't get much mature roles, she mostly get kiddish roles/comedy.