Severide makes up his mind by the end of Chicago Fire season 13, episode 2 — he can no longer work alongside Damon. It hasn’t been very long since he learned that they were related. However, Severide has been constantly put in the middle of contentious situations between his brother and wife, and that needs to stop. Based on episode 3’s preview, Severide’s decision will come to fruition.
Given Benny’s past behavior, it makes sense why Damon is so impulsive and quick-tempered in Chicago Fire season 13. Benny was a constant pain in the side for Severide, even though their relationship got a little better before the older man’s death. Benny wasn’t exactly an ideal father or role model, as he never stayed with one woman for too long before leaving her (and sometimes their child, like Severide) behind. Damon even revealed that Benny was abusive towards him during his childhood. As a result, Damon’s recklessness and need to impress his brother is getting him into some trouble at Firehouse 51.
Damon strived to be like his brother and was looking for a male role model in his life, and all the while Severide didn’t know who he was.
To deal with his father’s behavior, Damon grew up idolizing Severide (despite not actually knowing him). Damon strived to be like his brother and was looking for a male role model in his life, and all the while Severide didn’t know who he was. Flash forward many years later, Damon and Severide are working at the same station and developing a relationship.
