Michelle's background is a mystery. How could she really have one? Artemis made her in thought but she could have given her to a family after words. We really don't know whether she has a family or not but she does have a tendency to get attached to people very quickly. She appeared at camp one day already knowing her godly parent was Artemis. She fit in perfectly too.
Michelle unfortunately has had a terrible past with the titans. When the war started she was not with them. The titans won and she watched all the people she called family be tortured and chained up. In the end of the war she saved the Olympians and the one she calls her sister, Diana. Michelle isn't techinally s huntress, since she still flirts and doesn't hate boys or listen to the rules, but no one pays attention to it. She doesn't like her mother because of how reckless she is and the things she put her through. Truthfully, she doesn't care anything obout Artemis and shows how much she hates her. She likes to shoot her and say she got her confused with monsters. Her mother doesn't like her much either and is unfair to her. She's a trader daughter in her opinion. Michelle doesn't really care though. She'd be quite content with being human and not knowing about the gods, but that isn't really possible. Diana is the only person she actually cares about and talks to about everything. Michelle is a great huntress and a fun person but also a viscious person that could turn her back on you when you least expect it, watch out.