@CGI-Quality: If you do a huge list of characters, that just proves the point that none of them stands above the others enough to be a mascot.
Sony doesn't need a mascot as others have said, and they don't have one. The closest thing in terms of mass recognition would be Gran Turismo, but that's not a character so it doesn't really work as a mascot.
My Mario Kart Wii friend code: 2707-1866-0957