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 Dr. Kendra Perrington 6 guest appearances Clarice Carthage 6 guest appearances James 6 guest appearances Jamie Killian 6 guest appearances Tamara Jones 6 guest appearances Grant Smith 6 guest appearances Assistant Deputy Commissioner Jerry Gorsch 6 guest appearances Lieutenant Greg Grainger 6 guest appearances Firefighter Derrick Gibson 6 guest appearances Dr. Olga Patchefsky 5 guest appearances Fireman 5 guest appearances Arthur 5 guest appearances ER Doctor 5 guest appearances Lieutenant Spellman 5 guest appearances Officer Becerra 5 guest appearances Paramedic Allison Rafferty 5 guest appearances Deputy District Chief Lionel Jones 5 guest appearances Katya Antov 5 guest appearances Detective Hank Voight 5 guest appearances Susan Weller 5 guest appearances ⇤ « 1 2 3 4 5 6 7 8 9 10 » ⇥