The character Jig is from a short story by hemingway. The title of the story is "The Hills Like White Elephants".
From my point of view, Jig is a young girl around 18 years old but dating a 40-year-old man. She doesn't want to be treated like a kid by her boyfriend so she trys to act mature. She mimics what "mature" women do and has her own theory about life. There are moments that shows her nature as a young girl, for example when she is mad or scared.
I'm still working on this one.