https://variety.com/2023/tv/news/chicago-fire-kara-killmer-exit-season-12-1235791982/
Killmer, who joined the NBC procedural as Sylvie Brett in Season 3 in 2014, will leave the show in the latter half of Season 12. Killmer also recurred on Chicago Med and Chicago P.D. Killmer's Sylvie was involved with Jesse Spencer's Matt Casey. Spencer left Chicago Fire in Season 10, but returned in Season 11 to fill the void left by Taylor Kinney's temporary absence. In the final moments of the season finale, Casey proposed to Brett.
Brett’s Final Chicago Fire Season 12 Episode Revealed (https://screenrant.com/chicago-fire-season-12-brett-exit-episode-confirmed/)
NBC releases an official synopsis revealing when exactly Kara Killmer's final episode as Sylvie Brett in Chicago Fire season 12 will be.
Why Is Sylvie Brett Leaving Chicago Fire? Kara Killmer's Exit Explained (https://screenrant.com/chicago-fire-why-sylvie-brett-leaving-kara-killmer-explained/)
Kara Killmer, who plays Sylvie Brett, is leaving the NBC show Chicago Fire during season 12 – read on to learn more about why the actress is exiting.
Kara Killmer Confirms Whether She Would Return As Sylvie Brett After One Chicago Exit (https://www.looper.com/1526719/kara-killmer-sylvie-brett-return-after-one-chicago-exit/)
Sylvie Brett, a longtime favorite on "Chicago Fire," is leaving Firehouse 51, and Kara Killmer has some earnest thoughts about a possible return.
Chicago Fire Season 12 Already Has The Perfect Replacement For Brett & Casey After Their Exit (https://screenrant.com/chicago-fire-season-12-violet-carver-brett-casey-replacement/)
Sylvie Brett and Matt Casey have officially moved out of the Windy City, and a new Chicago Fire romance can take the couple's place in season 12.
"It Was A Blast": Chicago Fire's Kara Killmer Isn't Sad About Her Season 12 Exit (https://screenrant.com/chicago-fire-season-12-kara-killmer-exit-reaction/)
Chicago Fire star Kara Killmer isn't sad about her exit as Sylvie Brett in season 12, showing how fitting an end her character ended up getting.