Early in his childhood, Dane McGowan affects the cold, violently rebellious persona of "Jack Frost" in order to cope with his shattered home life.
After trying to burn down his school, Dane is sent to Harmony House, a reeducation facility for young boys run by the Outer Church, the villains of the series.
After being injured on a mission, Dane abandons his teammates and wanders through London, eventually returning home to Liverpool.
While Dane rejects their violent methods and their dualistic perception of the world, which he finds just as flawed as that of the Outer Church, he stays with them because they are his friends.
When he is ready, Dane starts his own Invisibles cell and, in 2012, oversees the end of the physical world as foreseen.
Once a horror writer named Gideon Starorzewski, King Mob is the leader of the cell of the Invisibles.
She has some mental difficulties related to her time traveling – she introduces herself to Jack Frost by saying, "Hi, I'm Ragged Robin – I'm nuts."
Hoping they will help her rescue her brother Martin, Lucille allows herself to be recruited by the Invisibles, who give her the code name "Boy".
Boy later steals an artifact known as the "Hand of Glory" and goes searching for the secret prison camp in which she believes Martin to be detained.
When she realizes that there is no way to save Martin, and there never had been, Boy quits the Invisibles forever, and she starts a new life in New York, where she later has a child.
Born male into a matrilineal family of brujas, she was raised as a girl and put through a blood rite of passage as a child where she faced Mictlantecuhtli, the Aztec god of death and gained magical powers and the knowledge of their whole life.
Although out of commission when The Invisibles starts, they are brought back together at the end of volume one and soon find themselves on the trail of The Outer Church.