"Mistress" is the corresponding term here. When addressing children, the terms are usually used by household servants and other employees of a noble household (not necessarily royalty, but landed gentry) because the child is technically one of the people being waited upon (usually it is the child of the house's "lord" or "lady").
MIss
Apparently he sounds like a girl for a while in the show, but is a boy.
A young girl horse is called a filly, and a young male is called a colt. An adult female is called a mare, and an un-castrated adult male is called a stallion. A castrated adult male is called a gelding.
Master
young ma is a girl
girl
young ma is a girl
boy
adolescent A boy, a gentleman, a dude, a guy, or even a punk. I believe the term adolescent is just too general to refer specifically to a young man, as it can refer to any boy or girl.
Well....yeah,i guess.Only if the boy is smaller then the girl
Boy bands/girl bands
boy