JJ (Station 19)

JJ is a woman whose smoke detector kept going off without a fire.

History
JJ was trying to have sex with her sometimes-boyfriend Seth when the smoke detector kept beeping. Annoyed by the sound and their inability to have sex, Seth took a baseball bat and hit the smoke detector. JJ took the smoke detector to the fire station to have it repaired and then took it home.

Later, the firefighters were called to her apartment because her neighbor heard her screams. They found her on the floor, where she had fallen and hit her head. Her smoke detector was still beeping. Dean asked her if she had an attic, but she said it was more like a crawl space. He broke through the ceiling, which released smoke. He quickly picked up JJ and carried her out.

Romantic
She's seeing Seth, whom she describes as her sometimes-boyfriend. Despite this, she flirted with Dean while she was at the fire station.