Chicago Fire: Characters Chicago Fire Drama, Action 10/10/12 – NBC United States http://www.nbc.com/chicago-fire GeneralEpisodesCastCharactersGallery Characters See all characters → Darren Ritter Paramedic Violet Mikami Firefighter Brian "Otis" Zvonecek Firefighter Randy "Mouch" McHolland Lieutenant Kelly Severide Battalion Chief Wallace Boden Captain Matthew Casey Firefighter Joe Cruz Lieutenant Christopher Herrmann Gabriela Dawson Paramedic Sylvie Brett Firefighter Stella Kidd Peter Mills Paramedic Leslie Shay Jimmy Borrelli Paramedic Emily Foster Paramedic Jessica "Chili" Chilton Dr. Hallie Thomas Firefighter Randy "Mouch" McHolland Captain Matthew Casey Lieutenant Kelly Severide Firefighter Joe Cruz Battalion Chief Wallace Boden Lieutenant Christopher Herrmann Firefighter Brian "Otis" Zvonecek Paramedic Sylvie Brett Firefighter Stella Kidd Paramedic Leslie Shay Paramedic Emily Foster Candidate Blake Gallo Paramedic Jessica "Chili" Chilton Dr. Hallie Thomas Firefighter Randy "Mouch" McHolland Firefighter Brian "Otis" Zvonecek Paramedic Jessica "Chili" Chilton Firefighter Randy "Mouch" McHolland Firefighter Brian "Otis" Zvonecek Paramedic Jessica "Chili" Chilton Firefighter Randy "Mouch" McHolland Firefighter Brian "Otis" Zvonecek Paramedic Jessica "Chili" Chilton Firefighter Randy "Mouch" McHolland Firefighter Brian "Otis" Zvonecek Paramedic Jessica "Chili" Chilton Candidate Darren Ritter Paramedic Gianna Mackey