In Yu-Gi-Oh! 5D’s – Tag Force 5 for the PSP, there are several characters you can unlock by completing the story mode with specific characters.
Jack Atlas Imposter – Beat story mode with Lazar
Kalin Kessler – Beat story mode with Leo
Lazar – Beat story mode with Crow Hogan
Mina Simington – Beat story mode with Tetsu Trudge
Primo – Beat story mode with Vizor
Sherry LeBlanc – Beat story mode with Akiza Izinski
Vizor – Beat story mode with Yusei Fudo