Stats
HP: This is the current as well as Max amount of life that you have that keeps that character(s) running though and throughout the battles and the game. It is also short for "Hit Points".
MP: This is the current as well as Max amount of Magic that you have that helps keep that character throughout the course of some battles. It is also short for "Magic Points".
STR: This stat is the count of how much power and how much punch that person can put behind their attacks when they use their attacks in the battle. It is also short for "Strength".
MAG: This stat is the count of how much Magic and how much damage that person can put behind their Magical attacks when they use them. It is also short for "Magic".
DEF: This stat is the count of just how much they can naturally reduce the amount of damage done by one of the opposition's attacks directed toward you. It is also short for "Defense".
MAG DEF: This stat is the count of just how much they can naturally reduce the amount of damage done by one of the opposition's Magic attacks directed toward you. It is also short for "Magic Defense".
AGL: This stat is just how speedy, quick, agile, whatever, that your character is through and throughout the battle and how. It is also short for "Agility".
ACC: This stat is just how easily you can make contact with the desired target in battle when you are going to attack at it with that character. It is also short for "Accuracy".
EVA: This stat is really just the count of just how easily that character is able to dodge and evade attacks from the enemies at them. It is also short for "Evasion".
LUCK: This stat is actually, mostly just a combination of Evasion and Accuracy stats, so if you raise this, you don't have to raise up those two others. It isn't short for anything because I actually list the full name "Luck" above this explanation. Also increases Critical Hit ratio.