She lost her father, Robert Greenaway when she was only 8 years old, and in the season 1 finale, while she is in a coma after she gets shot, she talks to her father. Later, she shoots a serial rapist in cold-blood after they released the man from custody, and left the BAU. I really miss her!!!
-"Yeah, what about her?"
"She's so bitchin' when shes in her gun stance ready to shoot!!"