10 most disliked Chicago Fire coupled, ranked

We don't hate these characters, but these combos didn't work.

CHICAGO FIRE -- "Best Friend Magic" Episode 809 -- Pictured: (l-r) Monica Raymund as Gabriela Dawson, Jesse Spencer as Matthew Casey -- (Photo by: Adrian Burrows/NBC)
CHICAGO FIRE -- "Best Friend Magic" Episode 809 -- Pictured: (l-r) Monica Raymund as Gabriela Dawson, Jesse Spencer as Matthew Casey -- (Photo by: Adrian Burrows/NBC) /
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8. Sylvie Brett and Greg Grainger

Chicago Fire - Season 9
CHICAGO FIRE -- "Escape Route" Episode 908 -- Pictured: Jon-Michael Ecker as Lieutenant Greg Grainger -- (Photo by: Adrian S. Burrows Sr./NBC) /

Greg Grainger (Jon-Michael Ecker), for those who don't remember, got on the wrong side of Matt Casey. The two men do not get along, and Casey made it pretty clear that he did not want to be get any closer to Grainger than he needed to.

Related: Chicago Fire presents two career paths for Severide

While Grainger eventually won over Casey's respect with quick thinking in the field, it didn't help that Grainger dated Sylvie Brett (Kara Killmer), the woman that Casey will eventually marry. Grainger and Brett weren't awful together, but they did feel pointless, since we all knew who Brett really had feelings for.