FFVI takes pride on there being no "true" main character, but if you had to choose...

[MJN SEIFER]

Based on a serious decision, and not just ruling out characters that I like more than the rest, I say either Terra or Locke are most likley to be concidered the main character. Terra is the main focus during most of the storyline - the Espers, and the like, and the game begins and ends with her. Locke is the second character to join, but he kind of seems like a "stereotypical" main character to me - he's got the whole "I'll devote my life to saving you" thing going on, his theme sounds "main character-ish", he often seems to be put in situations which an RPG main character would normally be put in. However in WoR he is less of a central role, and is just another character.

Celes probably comes fairly close to being the main character, exept she joins too late to really be concidered the main character, unless you count the WoR as a seperate story - in which case, she is the main character for that part of the game, as she is the one recruiting everyone. If Locke is to be concidered the main character, then Celes could be concidered the "interest" of the storyline...

All the other characters either join to late, or just don't have enough bearing on the storyline to be concidered the main character - like all FFs each character has their own background and storyline, and at some point that will be adressed, but they remain characters when it's done, e.g. Cyan's storyline is Doma, and recovering from the pain of his family dying, once that's done his story ends, but he is still part of the main team - he is not the main character, but rather a story within a story, as are most of the team. Obviously Gogo and Umaro can't count, as they are secret characters.

This is not intended to be acurate, it's just my view - after all there is no official main character in FFVI - if there was we would be forced to use him or her at least 95% of the game.