Although she brought a feisty, and often fun, attitude to the show, Chili's time on Chicago Fire was mostly marked by tragedy. After a rocky introduction to Firehouse 51 in season 3, she seemed to find her footing with her new colleagues by the final episode. When she returned for season 4, however, things began to unravel. After a relationship with a colleague had to be broken off due to concerns about professionalism, Chili became despondent and easily irritable.
It is soon revealed that Chili's strange behavior has a cause more serious than a doomed love affair: Her twin sister, Alissa, was found dead in her home. Chili is not only having personal issues after her sister's death, but she's also beginning to make critical mistakes on the job. Soon, it's revealed that she is sneaking away to drink during her shifts. After she is caught and confronted by Kelly Severide (Taylor Kinney), she is forced to confess to Chief Boden (Eamonn Walker). Even though she promises to go to rehab, Boden fires her on the spot.
It's a shocking end to a tragic story. Despite being billed as a series regular in season 4, Chili's final episode came midway through the season. This left fans wondering exactly why the character left the show when she did.
