Autumn is a 17 year old thief from Lower Haven. She is a member of the Haven Thieves' Guild and protege of Thalin and Elysia, two of the Guild Elders. They have raised her as if she was their own daughter and trained her with the skills she'll need to survive on her own.
When Autumn was 7 years old she showed up on the streets of Lower Haven, most likely a runaway, with only the clothes on her back and a sword much too big for her. Stealing food to survive, she was eventually brought to the Thieves' Guild for shelter. Thalin noticed the girl's sword and asked her where she got it. She wouldn't give him the answer but she did agree when he asked if she wanted to learn to use it.
As she grew up, she showed signs of being connected to magic. Elysia would note how she seemed to know if something was magic and would be wary of touching it. Elysia worked with the young girl and through training taught Autumn to cast her first spells.
Autumn, in general, is very light-hearted, joking with other thieves in the guild and comfortable around people. It's when the spotlight is cast on her that she draws inward. She does not like talking about her past or her future. She is wary of anything magical, including her own powers. She would much rather trust her sword and her skills.