Here's the list of characters in the story:

The Backstreet Boys:
Nick Carter
Brian Littrell
Kevin Richardson
Howie Dorough
AJ McLean

Britney Hardin-Carter: Called Bri, Amy's best friend, she meets Nick and they get married.

Amy Nussbeck-Littrell: Bri's best friend, Brian's wife, mother of Gracie.

Gracie Lynn Littrell: Brian and Amy's daughter.

Jason Robert Carter: Nick and Bri's son

Jane Carter: Nick's mother and Bri's mother-in-law.

Bob Carter: Nick's father and Bri's father-in-law

BJ Carter: Nick's sister, aspiring actress, and model

Leslie Carter: Nick's sister and aspiring singer

Angel Carter: Nick's sister, Aaron's twin sister, and model

Aaron Carter: Nick's brother, Angel's twin brother, and prince of pop.

Amanda Latona: AJ's girlfriend, now ex-girlfriend

Kristen Richardson: Kevin's wife

Matt Leawood: Bri's ex-boyfriend

Mark Rosewood: Amy's ex-boyfriend

Leighanne Wallace: Brian's ex-girlfriend

Mandy Whilford: Nick's ex-girlfriend

Jackie Littrell: Brian's mother

Harold Littrell SR: Brian's father

Harold Littrell JR: Brian's brother

Ann Richardson: Kevin's mother

Dr. Kelly: Bri's doctor

Hilary: Aaron's girlfriend

Susan Hardin: Bri's mother

Carol Nussbeck: Amy's mother