Michael Morgan is the central character and the sixteen year old secret of his parents, Jason and Caroline Morgan. His world is turned upside down when he discovers that he is really A.J. Quartermaine's son.
Spencer Morgan is the gentle, sweet natured but mischievous younger brother to Michael. Everything changes one day when his formerly tight knit family explodes as the secret of Michael's paternity becomes known.
Mary Mae Quartermaine is the headstrong but beloved daughter of A.J. and Keesha Quartermaine and cousin/half-sister to best friend Michael. She too, becomes involved in the revelation of Michael's paternity and conflicted feelings arise as she deals with her stubborn nature while trying to support Michael and also juggle a budding romance with Dominic Cassadine.
Andrea Collins is the sweet-natured and intelligent daughter of Kevin and Lucy Collins and also Michael Morgan's girlfriend who plays a pivotal role in the revelation about his paternity. Thoughtful and a good listener but having the tendency to jump to conclusions and ramble, she is a perfect combination of her parents.
Dominic Cassadine is very much his Mother's, Alexis, child. Smart, gentle but cunning, he rounds out the group of teenagers who are knee deep involved in the revelation of Michael's true paternity. Although trying to keep himself at arm's length, it is proving more difficult with every additional minute he spend in the company of the beautiful Mary Mae Quartermaine.
Jerry Jacks is Jasper 'Jax' Jacks's older, more volatile brother. His return to Port Charles carries a heavy and dangerous cargo in the form of bitter revenge. As a single Father to Jewel, he is reminded everyday of the death of his wife Deanna, and the man responsible for her violent end, his former business associate, Jason Morgan.
Jewel Jacks is Jerry's bright and spirited 10 year old daughter. She is unaware of the impending danger her Father has embarked upon in her Mother's name and as the eldest child of the eldest child, is poised to take control of the Jacks Empire when she is old enough.
Dade Phillips is Jerry's right hand man/associate who has become more of a guardian to Jerry's tortured soul over the years. As he obligingly follows Jerry back to Port Charles, he is unaware that a large chapter to his own past awaits him.
Lucas Jones is Bobbie Spencer's 24 year old son who has suspected Jason Morgan's involvement in the sudden death of his Father, Tony Jones, 4 years ago. This has led to strains between Bobbie and Carly as well as an almost extinct relationship between Lucas and Carly. He has not forgiven Jason for his role he played in Father's death, nor has he forgotten.