I'm thinking the person you pick will determine the diffuculty.
Ven: Easy(Becuase he's the youngest and seems less skilled)
Aqua:Medium(Becuase she's a bit older then Ven by the look of it)
Terra:Hard(Becuase he looks the oldest and most skilled)
It would also make it more difficult to get the story and make the game longer
Ven: Easy(Becuase he's the youngest and seems less skilled)
Aqua:Medium(Becuase she's a bit older then Ven by the look of it)
Terra:Hard(Becuase he looks the oldest and most skilled)
It would also make it more difficult to get the story and make the game longer