Jermiah was the only person in the household with the Loves the Heat trait. He was created as a Child to be Lola's big brother; Lifesimmer described him as a "stud".
When Jermiah Aged Up, he developed the Kleptomaniac trait. This allowed him to swipe items from other households to help support the family. He never tried too hard in school and received consistently average grades.
After graduating, and coincidentally being awarded Most Likely To Get Arrested, he joins the Criminal career and, of course, is arrested.
At the Spring Festival he meets a townie Sim named Lucia Bromberg. Jermiah dates her for several hours before proposing in front of the fountain at central park. Lifesimmer becomes emotional after telling Jermiah to Be Frisky with Lucia, not realizing it means to WooHoo, having to remind herself that "Jermiah's a man now". A while after they are married, the couple have their only child, Robert.