The romantic relationships in Chicago Fire aren't only meant to depict characters falling in love and finding happiness, but to test how firefighters and paramedics can balance their personal lives and their work without being distracted.
While many of these romantic bonds have resulted in fulfilling marriages, there have also been break-ups and/or emotional losses. As such, relationships with toxic love interests have defined the trajectory of the characters in this One Chicago show, especially those who have suffered heartbreak and made career comebacks.
10 Sam Carver’s Ex-Girlfriend Tori
Tori Has Been A Distraction For Carver

Sam Carver took a little while to get used to Firehouse 51 when he first joined the crew in season 11. However, after growing accustomed to the unit and falling in love with paramedic Violet Mikami, Carver felt he belonged. That is until Violet felt hesitant to commit to a serious relationship after the loss of Paramedic field chief Evan Hawkins. This causes Carver to move on from her and start a fling with Tori, his high-school crush. While Carver tries to be happy with Tori, he is disappointed with her because, deep down, he's still in love with Violet.
Aside from his feelings for Violet, Carver dislikes Tori's interference at the Firehouse because he considers her a distraction. Tori constantly wants to have fun with Carver so he can prioritize her over his job. This upsets Carver because he intends to be at Firehouse 51, causing him to unleash his frustration at work and Stella Kidd monitoring his behavior. Due to their disagreements, Tori leaves Chicago and Carver is back to focusing on firefighting.
9 Monica Pascal’s Husband Chief Dom Pascal
The New Couple In The Show Has Had Problems Already

The relationship between Chief Dom Pascal and Monica has recently commenced this season, but right off the bat, the tension between them is evident. While they passionately love each other, Monica gets upset with Dom because of his long work schedule with Firehouse 51. She also argues with her husband when Dom refuses to tell her everything. For instance, when Dom investigates the crooked police officer involved with ghost guns, he knows he and his wife are in danger. Dom tells Monica to stay with a family member, but she refuses to leave home and wants to understand his problem.
8 Violet Mikami’s Ex-Boyfriend Sam Carver
Carver And Violet Were Getting Along Well Until This Season

At first glance, Sam and Violet don't seem like a potential match, but they have similarities. They are intelligent and hard-working individuals who have experienced personal losses and been in trouble with their superiors for taking major risks during life-saving situations. After the sudden loss of her previous boyfriend, Hawkins, Violet felt emotionally unwilling to commit to a serious relationship again. That is until paramedic Sylvie Brett encouraged Violet to go out with Sam, which led to a casual relationship.
Despite Sam and Violet's love for each other, Violet is still hesitant about having a boyfriend in the workplace after Hawkins' tragic death.
7 Matt Casey’s Ex-Girlfriend Gabriela Dawson
Casey and Gabby Were A Primary Couple On This Show

Before his relationship and eventual marriage to Sylvie, Matt Casey was married to paramedic Gabriela Dawson. Despite their excessive workloads, the two had a passionate relationship. However, there was heartbreak when Gabriela lost her baby during pregnancy and lost custody of her adoptive son Louie in season 5. Gabriela left the show in season 6 to provide aid in Puerto Rico, resulting in her divorce from Casey. She makes recurring appearances in seasons 7 and 8, which mark a pleasant but conflicting reunion for Gabriela and Casey because, at this point, Casey and Sylvie start developing feelings for each other.
While Casey deeply loved Gabriela during their time together, they had disagreements about how to have children. Gabby always wanted to have a biological child. However, Casey thought adoption was the best option because he constantly worried about Gabby's health due to a pre-existing aneurysm that could've killed her during her pregnancy. Gabriela's departure was difficult for her and Casey due to their long relationship, but fortunately, Casey found Sylvie afterward.
6 Blake Gallo's Ex-Girlfriend Violet Mikami
Violet And Gallo Were Flirtatious And Competitive

Violet's first appearance on Chicago Fire revolved around her casual relationship with firefighter Blake Gallo. Given that they went to the same fire academy, they've always competed with each other. During a call involving a car crash in season 8, episode 10, Hold Our Ground, Violet argues with Gallo about not following proper protocol. However, their arguments turn out to be flirtatious behavior, resulting in them having a non-serious fling.
The bond between Violet and Gallo takes a turn when Violet meets Hawkins and develops feelings for him. After Hawkins' tragic death, Violet has sparks with Gallo again when she comforts him during his recovery from a neck injury. But Gallo realizes that Violet's care for him is a result of her grievance about losing Hawkins, causing Gallo to distance himself from her because they both know that it is the wrong time to commit to a serious relationship. Gallo would eventually leave Firehouse 51, but he and Violet have maintained respect for each other as friends.
5 Matt Casey's Girlfriend Sylvie Brett
Casey And Sylvie Were A Highly Anticipated Couple The Last Few Seasons

While Casey and Gabriela parted ways, Sylvie also had failed love interests, including firefighter Joe Cruz and Antonio Dawson. However, in season 7, as Matt and Sylvie grow closer together, they are constantly driven apart due to Brett's previous love with Fire Chaplain Kyle Sheffield and Casey's brief reunion with Gabriela after a fundraiser. Matt and Sylvie are uncertain about how to commit to a serious relationship, but the two ultimately get together and marry because they have seen the good in each other over the years and make one another happy.
4 Kelly Severide’s Wife Stella Kidd
Severide And Stella Have Maintained A Strong Relationship

After Grant and several casual relationships, Stella always had feelings for Severide, who deeply cared about her as well, resulting in their marriage and lasting rapport with Firehouse 51.
However, the beginning of their relationship was in doubt because Severide disliked Stella's toxic relationship with her first husband, Grant Smith. Kelly even saved Stella from Grant in season 5 after Smith threatened Kidd with a knife. Severide was upset with Kidd because she refused to press charges against Grant and wanted to resolve this issue herself. After Grant and several casual relationships, Stella always had feelings for Severide, who deeply cared about her as well, resulting in their marriage and lasting rapport with Firehouse 51.
3 Violet Mikami’s Ex-Boyfriend Evan Hawkins
Violet And Hawkins Were A Pleasant But Ultimately Tragic Pairing

No matter how much they try to keep their distance, and the jeopardy placed on their jobs, Violet and Evan disregard other people's opinions and decide to continue seeing each other. Unfortunately, Hawkins faces a tragic end as he is crushed by a collapsed building while trying to rescue a male civilian. Evan's death leaves Violet in emotional despair, making it difficult to do her job, and she refuses to find love again in the workplace. That is until she sees Carver, who may still be in play by the end of season 13.
2 Jimmy Borelli’s Ex-Girlfriend Jessica Chilton
Borelli And Chilton Were A Brief But Intriguing Couple

Jimmy Borelli and Jessica Chilton are two of the more lesser-known characters on the show, but left lasting impressions due to their dilemmas. Borelli is an ambitious firefighter turned paramedic who tends to be reckless at times during calls and his disagreements with Chief Boden. Chilton is a paramedic with a history of alcoholism due to a troubled childhood with her parents and has a difficult time maintaining relationships.

ScreenRant interviews Chicago Fire star Joe Miñoso about whether Cruz still wants to be a lieutenant and the lasting impact Otis has on his character.
1 Stella Kidd’s Ex-Husband Grant Smith
Grant Was A Devastating Marriage For Stella

Before finding love with Severide, Stella Kidd had a toxic and abusive relationship with her first husband, Grant Smith. Grant dealt with several problems, including anxiety and drug addiction. This made it difficult for Stella to focus on her marriage and her aspirations to be a firefighter in Firehouse 51. No matter how much Kidd tried to help Smith, he could never get himself out of trouble.
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