Mary-Beth Williams - Grand Theft Wiki, the GTA wiki

Mary-Beth Williams is the new born baby of Louise and Marty that appears a few times in the game. It is thought that after both her parents die her aunt Mary-Jo takes care of her.

Trivia

Mary-Beth Williams is the only minor to be featured in the Grand Theft Auto series.
Mary-Beth Williams is seen briefly in a blue Hawaiian blanket, similar to that of Tommy Vercetti's street shirt in Grand Theft Auto: Vice City.

v e Characters in Grand Theft Auto: Vice City Stories

Protagonist	Victor Vance

Main characters	Phil Cassidy \| Louise Cassidy-Williams \| Ricardo Diaz \| Jerry Martinez \| Armando Mendez \| Diego Mendez \| Lance Vance

Supporting characters	Bryan Forbes \| Gonzalez \| Umberto Robina \| Reni Wassulmaier \| Marty Jay Williams

Minor characters	Robin Banks \| Bub \| Carlos \| Mary-Jo Cassidy \| Phil Collins \| Diego \| Aunt Enid \| Fernandez \| Frankie \| Hank \| Hilberto \| Abner Horowitz \| Javier \| Juan \| Mary \| Barry Mickelthwaite \| Mona \| Ron A. Muck \| Juan Ovzem \| Sergeant Peppah \| Alberto Robina \| Ronaldo \| Abe Rudder \| Spitz \| T.J. Sucker \| Janet Vance \| Mary-Beth Williams

Radio DJ	Trish Camden \| Maurice Chavez \| Couzin Ed \| Adam First \| Jonathan Freeloader \| Heinrich Havelock \| Hector Hernandez \| Phil Herrick \| Larry Joe \| Lazlow \| Luke \| Lionel Makepeace \| Michelle Montanius \| Bryce Parker \| Pepe \| Bobbie Ray \| John Sickerman \| Chuck Summers \| Teri \| Dwayne Thorn \| Tina Jane \| Toni

Radio characters	Lily Banbury \| Pete Banbury \| Chief \| Ernest Keigel \| Molly Malmstein \| Gordon Moorehead \| Pablo \| Richard

Radio guests	Bryony Craddock \| Kenny Crane \| Martin Graves \| Pedro \| Jeremy Robard \| Thorton \| Forbes Waverly III

Multiplayer characters	Colin Allcars \| Agent Alman \| Harry Balzac \| Robin Banks \| Candy Barr \| Anita Bath \| Bub \| Des Buratto \| Officer Butts \| Officer Cracker \| Decjuan DeMarco \| Duane DeVane \| Kanye Diggit \| Martha Fokker \| Dee Generate \| Gabe Hiker \| Jose \| Daryl Lect \| Moe Lester \| Harris Mint \| Ron A. Muck \| Pearl Neklass \| Joaquin Noff \| Beau Nurr \| Buster Nutt \| Cam O'Flarge \| Juan Ovzem \| Abe Ozo \| Chris Packet \| Private Parts \| Private Places \| Poop Dawg \| Pops \| Agent Provocateur \| Stacy Rhect \| Abe Rudder \| Boyd Schidt \| Hayden Seek \| Fidel Sistaxez \| The Specialist \| T.J. Sucker \| Sue E. Sydle \| Leo Tarred \| Tess Tickle \| Jenny Tulls \| Tate Urchips \| Lee Vitout \| Dylan Weed \| Hugo Zehr

Other characters	Cousin Bob \| Juan Cortez \| Jock Cranley \| Derek the Dodo \| Destiny \| Doris \| Dot \| Eileen \| Betty Feeley \| Giorgio Forelli \| Trent Hopkins \| Abner Horowitz \| Jack Howitzer \| Stonewall J \| Bonnie Knight \| Linda \| Marie Sue \| Beverly McFadden \| Police Commissioner McGinley \| Jenny Mitchell \| Mystique \| Clay Parsons \| Puddles \| Ricardo Diaz' Girlfriend \| Smithy \| Tim \| Trev \| Chris Van Angel \| Pete Vance

Characters in GTA Vice City Stories (Category) \| Characters in 3D Universe Antagonists \| Affected by choices \| Arms dealers \| Mission givers \| Deceased characters \| Drug dealers \| Gang leaders \| Gangsters \| Police officers \| Protagonists \| Radio DJs \| Unseen characters