Halstead plays the guitar and performed at weddings to pay his way through medical school. It was a reference to actor Nick Gehlfuss's days as a busker in New York City when he first entered the acting industry. He is a supporter of the Chicago White Sox like his father. Natalie Manning (née Conte) is a pediatrician originally from Seattle who is an attending in emergency medicine specializing in pediatrics. Natalie was widowed when her husband, Jeff, a soldier, was killed in Afghanistan and gave birth to their son, Owen. She is revealed to be a skilled violinist, as seen in season 1 episode "Fallback" and season 2 episode "Brother's Keeper". In season 1, Natalie is portrayed as a caring doctor who sometimes becomes overly emotionally connected to her young patients. She is also grieving for her late husband and gently dissuades Dr. Halstead's romantic advances asking to remain friends. In the first episode of the third season “Nothing To Fear”, Natalie returns from a three-month sabbatical and tells Will she has feelings for him and they became a couple. He proposes to her in the season 3 finale. Season 4 sees the couple planning for their wedding and attending Pre-Cana together. April Sexton is a nurse in the Emergency Department. She was first introduced in "Chicago Fire" as a friend of Lieutenant Kelly Severide. April's parents were immigrants from Brazil. Their original family name was Suassuna but they anglicized it to "Sexton" as it was easier to pronounce. She attended high school with Severide and they share a close friendship. He had been going through a rebellious phase in high school after being abandoned by his father and the Sextons often invited him to their house out of concern. April is courted by an ex-pro football player, Tate Jenkins (Daren J. Powell) whom she meets when Tate brings his young son into the ED. She is initially skeptical and views Tate as a "player," but after getting to know each other, she develops a trust in him and they move in together. He proposes to her in the episode "Inherent Bias". In season 2, April is infected with Tuberculosis from a needle stick in the ED and has to deal with the ramifications in her personal and professional life. In the season 2 fall finale, it was revealed she that she is pregnant. However, the treatment for her tuberculosis put her in a difficult position as the medication was potentially harmful to the fetus.