The name of this girl is unknown. She lives in Portland Harbor and she's the lover of Jonnie. He informs Mike that he has been dating this girl but can not be seen with her and he wants Mike to make sure she gets home safe. However, during the drive, her other boyfriend, Billy, has spotted them and tells Mike to lose him. Mike drives off, loses Billy and takes her to Portland Harbor, where she walks off.
She use the same artwork as the actress who plays Mary in Scorned Lover. Its unknown if she is the same person.
Mike takes her to Portland Harbor, but if you compare the map with the GTA III's map, her home its actually one of the apartments south of Marco's Bistro.