Geez, I never realized he looked that small in battle. Vincent is tall.
Okay, Cloud is 5'7". Vincent is 6'. Barret is 6'4". Vincent looks about the right height compared to Cloud, but Barret looks like he's 5'7" as well. Maybe you can make Barret bigger in battle to more reflect his actual height. Characters' age and height and blood type are normally trivia and don't affect the game, but in this case, we can actually make use of the height fact.