Callie is independent, intelligent, artsy and very loyal as well as protective over her loved ones.
Throughout the show, she is shown to always put the needs of others ahead of herself, even if it costs her trouble.
Refusing to watch her brother be assaulted, she took a baseball bat to their foster father's car in order to distract his attention onto her.
While at a foster father's home, Jude tried on a dress owned by the man's ex-wife.
Their foster father walked in on him wearing it and began to violently beat him.
Despite successfully saving her brother, Callie was sent to juvie for her action until it was decided what would happen to her.
A social worker, Bill, from child protective services soon decided to send her to Lena and Stef, thinking a home without any male authority figures would do some good for her.