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 Nicki Rutkowski 3 guest appearances Corrine 3 guest appearances Officer Sobek 3 guest appearances Dr. Brenner 3 guest appearances Daniel Schwartz 3 guest appearances Officer Hiller 3 guest appearances ER Doctor 3 guest appearances James Whoritsky 3 guest appearances Jason Molina 3 guest appearances Prisoner 3 guest appearances Firefighter Brett Snow 3 guest appearances Shonda 3 guest appearances Lieutenant Eric Whaley 3 guest appearances Rochelle Leppert 3 guest appearances Nathan Marks 3 guest appearances Greg Sullivan 3 guest appearances Officer Banks 3 guest appearances Lisa 3 guest appearances Senator Quenton Wheeler 3 guest appearances Paramedic Erik McAuley 3 guest appearances ⇤ « 4 5 6 7 8 9 10 11 12 13 » ⇥