She was added to the cast shortly after her recurring role, which replaced Gabby Dawson, became popular.
Her short two-season stint ended on a positive note.
The truth is, there was a contract issue between Ilonzeh and the show.

Since her contract was not renewed, she was written off the show.
Fans were heartbroken but hopeful that she would return given her new medical internship.
Why were fans so passionate about Foster returning to “Chicago Fire?”

However, fans were most passionate about her returning to the “Chicago Fire” family.
One of the reasons fans were so passionate about Foster’s return is her relationship with Brett.
The pair worked together on the ambulance and had formed a tight bond.
The good news for fans is Foster will be featured somewhat in the upcoming season.
Haas shared, “We will hear some updates about how she’s doing as the season progresses.”