Okay, here are the characters I know nothing about.
Erdrick (Dragon Quest I)
Faris (Final Fantasy V)
Joker (Dragon Quest III)
Shadow (Final Fantasy VI)
Bianca (Dragon Quest V)
Montblanc (Final Fantasy Tactics: Advance)
Princess of Moonbrooke (Dragon Quest II)
Ragnar (Dragon Quest IV)
Hassan (Dragon Quest VI)
Emeralda (Xenogears)
Benjamin (Final Fantasy Mystic Quest)
Selkie (Final Fantasy: Crystal Chronicles)
Kiefer (Dragon Quest VII)
Duran (Seiken Densetsu)
Orlandu (Final Fantasy Tactics)
Magus (Chrono Trigger)