Chicago Fire:

Matt Casey - Lieutenant at Firehouse 51 and the officer in charge of Truck Company 81 and Second in Command to Battalion Chief Wallace Boden

Kelly Severide - Rescue Squad 3, lieutenant at firehouse 51, officer in charge of Squad 3, and third in command to battalion Chief Wallace Boden

Gabby Dawson - Ambulance 61, younger sister of Detective Antonio Dawson, and paramedic in charge of ambulance 61

Leslie Shay - my love interest, ambulance 61, paramedic, and designated ambulance driver

Peter Mills - truck 81, squad 3, and ambulance 61

Christopher Herrmann - senior firefighter, engine 51, previously truck 81, lieutenant, officer in charge of engine company 51, and fourth in command to battalion Chief Wallace Boden

Battalion Chief Wallace Boden - Battalion 25 and District Chief

Brian "Otis" Zvonecek - truck 81 and driver

Randall "Mouch" McHolland - senior firefighter, truck 81, legal advisor of 51, and their union representative, and married to Trudy Platt

Joe Cruz - squad 3

Sylvie Brett - paramedic for ambulance 61

Stella Kidd - truck 81 and lieutenant

Blake Gallo - truck 81

Darren Ritter - firefighter candidate for engine 51

Alex Johnson - My Oc, in charge of squad 3 with Kelly, and Temporary Captain of Firehouse 51

Chicago PD:

Sergeant Henry "Hank" Voight - Chief of the Chicago PD's Intelligence Unit

Detective Antonio Dawson - older brother to Gabby Dawson

Detective Erin Lindsay

Detective Jay Halstead - married to Detective Hailey Upton and younger brother to Dr. Will Halstead

Officer Adam Ruzek

Officer Kim Burgess

Officer Kevin Atwater

Detective Alvin Olinsky

Sergeant Trudy Platt - married to Randy "Mouch" McHolland

Detective Hailey Upton - married to Detective Jay Halstead

Chicago Med:

Dr. Will Halstead - older brother to Detective Jay Halstead

April Sexton - ED Nurse

Dr. Natalie Manning - ED Pediatrician

Dr. Sarah Reese

Dr. Connor Rhodes

LCDR Dr. Ethan Choi - United States Navy Reserve and The Chief of Emergency Medicine

Sharon Goodwin - the Chief of Patient and Medical Services

Dr. Daniel Charles - the Chief of the Psychiatry Department

Maggie Lockwood - ED's Charge Nurse

Dr. Ava Bekker - Trauma Surgeon

Dr. Crockett Marcel - Trauma Surgeon

Dr. Dean Archer - Emergency Physician

Dr. Dylan Scott - ED Pediatrician

Dr. Stevie Hammer - Attending Physician

Other Characters:

Robert Johnson - My Dad

Amanda Johnson - My Mom

Courtney Johnson - My Sister

Commander Emma Crowley - current commander of the 21st District

Justin Voight - Hank Voight's Son

Barbara "Bunny" Fletcher - Erin Lindsay's Mother

Chris Agos - Assistant State's Attorney

Lexi Olinsky - Alvin Olinsky's Daughter

Michelle Sovana - Alvin Olinsky's Daughter

Meredith Olinsky - Alvin Olinsky's Wife

Laura Dawson - Antonio's ex wife

Diego Dawson - Antonio's Son

Eva Dawson - Antonio's Daughter

Harold Capp - member of squad 3

Tony Ferraris - member of squad 3

Benjamin "Benny" Severide - Kelly's Father

Elise Mills - Peter Mills' Sister

Cindy Herrmann - Christopher Herrmann's wife, and mother of their five children

Katie Nolan - Benny Severide's Daughter and Kelly's Half Sister

Donna Boden - school teacher, Chief Borden's Wife, and mother of their son Terrance

Julian Robbins - Chief Boden's Brother In Law

Tuesday The Dog - The Firehouse Dog and a Dalmatian

Dr. Marty Peterson - An Anesthesiologist

Nurse Doris - ED Nurse

Nurse Monique - ED Nurse

Nurse Dina - ICU Charge Nurse, sometimes assists in surgical ward

Dr. Isidore Latham - The Attending Cardio-Thoracic Surgeon

Denise Lockwood - Nurse Maggie Lockwood's transgender sister

Dr. James Lanik - Chief of Trauma Surgery

Dr. Elsa Curry - ED Resident

DCFS Officer Madeline Gastern - Department of Child and Family Services Social Worker

Dr. Vanessa Taylor - senior medical student