Mary grew up in Hammerlocke on her family's estate, she enjoyed a peaceful if not somewhat strict upbringing as the heir to house Enett.
Jin was born and raised in a secluded martial arts school in the wilderness of Sinnoh's Battle Area, she enjoyed a great bit of freedom while also training from a young age to master her abilities to sense and manipulate aura.
Celeste grew up in Nacrene city with her family, she had a pretty normal childhood.