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 Nick Porter 5 guest appearances Hazmat Lieutenant Zach Torbett 5 guest appearances Naomi Graham 5 guest appearances Nurse 5 guest appearances Vice Detective Antonio Dawson 5 guest appearances Nurse 4 guest appearances Ernie 4 guest appearances Tara Little 4 guest appearances Nurse Beth Cole 4 guest appearances Nurse 4 guest appearances Detective Alvin Olinsky 4 guest appearances Jim Jordan 4 guest appearances Violet Jordan 4 guest appearances Brittany Baker 4 guest appearances Wallace Boden, Sr. 4 guest appearances Dr. Prospere 4 guest appearances Suzie Wilder 4 guest appearances Dr. Connor Rhodes 4 guest appearances Alderman Colin Becks 4 guest appearances Ronnie Turner 4 guest appearances ⇤ « 2 3 4 5 6 7 8 9 10 11 » ⇥