Instructions
Turn on your PlayStation 3.
Select the "Game" menu option.
Select "Save Data Utility."
Locate the file that represents the "Fallout 3" character you want to delete. Do not delete the "Fallout 3" settings file. Look at the file descriptions until you find the file with the "Fallout 3" icon that is named after the character you are trying to remove.
Press "Triangle" and select "Delete." The file will be deleted from your PlayStation 3, which will remove the selected character from "Fallout 3."