Main Characters Firefighter Randy "Mouch" McHolland 225 main appearances Deputy District Chief Wallace Boden 248 main appearances Firefighter Joe Cruz 224 main appearances Lieutenant Christopher Herrmann 246 main appearances Lieutenant Kelly Severide 238 main appearances Matthew Casey 200 main appearances Paramedic Sylvie Brett 192 main appearances Firefighter Brian "Otis" Zvonecek 137 main appearances Lieutenant Stella Kidd 151 main appearances Gabriela Dawson 138 main appearances Darren Ritter 69 main appearances Blake Gallo 67 main appearances Peter Mills 66 main appearances Paramedic Violet Mikami 51 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 April Nolan 3 guest appearances Nurse 3 guest appearances Vince Keeler 3 guest appearances Instructor 3 guest appearances Dave Bloom 3 guest appearances Anthony Lullo 3 guest appearances Captain Lynette Cunningham 3 guest appearances Dr. Givens 3 guest appearances Nurse 3 guest appearances Igor 3 guest appearances Firefighter Danny Borrelli 3 guest appearances Athena Bailey-Johnson 3 guest appearances Commander Nick Duffy 3 guest appearances Roger Maddox 3 guest appearances Detective Ryan Wheeler 3 guest appearances Serena Holmes 3 guest appearances Assistant State's Attorney Steve Kot 3 guest appearances DHS Secial Agent Alex Ward 3 guest appearances Commander Emma Crowley 3 guest appearances Danny Booker 3 guest appearances ⇤ « 5 6 7 8 9 10 11 12 13 14 » ⇥