Main Characters Firefighter Joe Cruz 227 main appearances Firefighter Randy "Mouch" McHolland 226 main appearances Lieutenant Christopher Herrmann 248 main appearances Deputy District Chief Wallace Boden 248 main appearances Lieutenant Kelly Severide 241 main appearances Matthew Casey 200 main appearances Paramedic Sylvie Brett 192 main appearances Firefighter Brian "Otis" Zvonecek 137 main appearances Lieutenant Stella Kidd 153 main appearances Gabriela Dawson 138 main appearances Darren Ritter 71 main appearances Blake Gallo 67 main appearances Peter Mills 66 main appearances Paramedic Violet Mikami 54 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 Nurse 2 guest appearances Carly 2 guest appearances Jan Marks (Nathan's Mom) 2 guest appearances Sgt. Conroy 2 guest appearances SWAT Leader Carson Hicks 2 guest appearances TV Anchor 2 guest appearances Rodney Ogle 2 guest appearances Super 2 guest appearances Lt. Ames 2 guest appearances Firefighter 2 guest appearances Firefighter McDowell 2 guest appearances Alderman Mark Blakeslee 2 guest appearances Nurse Lucy Barton 2 guest appearances Deputy District Chief Sam Mullins 2 guest appearances Rashidi 2 guest appearances Vice Principal 2 guest appearances Hector 2 guest appearances Julian Robbins 2 guest appearances Brady 2 guest appearances Homeless Teenaged Boy 2 guest appearances ⇤ « 12 13 14 15 16 17 18 19 20 21 » ⇥