Lieutenant of fire station 51 in charge of truck 81. A natural leader, even if she doesn't realize it at first. She is practical, empathetic, and good at handling tough situations. Her sharp mind makes her an adept problem-solver. She opened a program for young girls interested in firefighting called Girls on Fire. She’s married to lieutenant Kelly Severide. When she was 12, her parents passed away and she went to live with her aunt Laverne. 