Main Characters Firefighter Randy "Mouch" McHolland 226 main appearances Firefighter Joe Cruz 225 main appearances Deputy District Chief Wallace Boden 248 main appearances Lieutenant Christopher Herrmann 247 main appearances Lieutenant Kelly Severide 239 main appearances Matthew Casey 200 main appearances Paramedic Sylvie Brett 192 main appearances Firefighter Brian "Otis" Zvonecek 137 main appearances Lieutenant Stella Kidd 152 main appearances Gabriela Dawson 138 main appearances Darren Ritter 70 main appearances Blake Gallo 67 main appearances Peter Mills 66 main appearances Paramedic Violet Mikami 52 main appearances Paramedic Leslie Shay 46 main appearances Paramedic Emily Foster 37 main appearances Jimmy Borrelli 19 main appearances Paramedic Jessica "Chili" Chilton 14 main appearances Dr. Hallie Thomas 7 main appearances Paramedic Gianna Mackey 9 main appearances
Recurring Guest Characters Lieutenant Wendy Seager 14 guest appearances Griffin Darden 13 guest appearances Max Herrmann 13 guest appearances Commissioner Carl Grissom 13 guest appearances Firefighter Rick Newhouse 12 guest appearances Officer Adam Ruzek 12 guest appearances Nurse April Sexton 12 guest appearances Paramedic Michele Martinez 12 guest appearances Detective Erin Lindsay 11 guest appearances Chaplain Orlovsky 11 guest appearances Kenny James Herrmann 11 guest appearances Kyle Sheffield 11 guest appearances Dr. Hallie Thomas 3 guest appearances Heather Darden 10 guest appearances Paramedic Chief Hatcher 10 guest appearances Leon Cruz 10 guest appearances Renee Royce 10 guest appearances Chief Joel Tiberg 10 guest appearances Gail McLeod 10 guest appearances Charge Nurse Maggie Lockwood 10 guest appearances ⇤ « 1 2 3 4 5 6 7 8 9 10 » ⇥