Jo Karev

Josephine "Jo" Wilson is a surgical intern at Grey Sloan Memorial Hospital.

Early Life
At two weeks old, Josephine Wilson was left by her mother at a fire station. Jo was shuffled among numerous foster homes until the age of 16, when she began living independently out of her car. Her teacher, Ms. Schmitt, would let her in the building to wash her clothes before school. Jo worked furiously to get through school, evidently making it on her own through college and medical school, which are Princeton and Harvard Medical School respectively. It's notable that she graduated medical school at the top of her class. Wilson confessed to Alex Karev that Ms. Schmitt was the only person that supported her by saying, "[at graduation], I had one person: Ms. Schmitt."

Jason Myers
Jason hits Jo after Alex tells him about of Jo's past.

Alex Karev
Alex Karev frequently calls her "princess" due to her so-called 'prissy' manners and attitiude. He seems to have taken an interest in her. After a huge fight between the two of them, Jo revealed to Alex that Jason had hit her during their argument. During the super storm, Alex finally admits to Jo that he loves her and the couple shares a kiss.

Career
A Princeton/Harvard taught intern.

Dr. Wilson was selected by Meredith Grey as the most promising intern and was thus awarded the first solo surgery which she failed to complete. She was later informed by Dr. Owen Hunt that she wasn't meant to be able to complete it.