Battle Stats are elements which determine major aspects in the battle systems in the series.
Permanent Stats
HP
HP (short for Hit Points) determines how much damage a party member can receive before fainting. Their remaining HP is restricted to a maximum value as well. Using certain skills require some of the party member's HP to be used.
SP
SP is a value necessary for party members to use skills. Casting those skills will use up their limited supply of SP in the process. Similarly to HP, their remaining SP is restricted to a maximum value.
Strength
Strength (腕力, Wanryoku)?, also shortened to St (力, Chikara)?, partly determines the damage the party member's Physical skills deal. For more information on how the stat is calculated in battle, see Damage → Strength Attacks.
Magic
Magic (魔力, Maryoku)?, or Ma (魔力, Ma)?, partly determines the power of Magic skills, and the power of recovery skills. For more information on how the stat is calculated in battle, see Damage → Magic Attacks.
Endurance
Endurance (耐久力, Taikyūryoku)?, or En (耐, Tai)? partly determines how much damage the party member receives when they're hit by another entity's attack, whether its Physical or Magic. For more information on how the stat is calculated in battle, see Damage → Defense Subtraction.
Agility
Agility (俊敏さ, Shunbin-sa)?, or Ag (速, Haya)? mainly determines the turn order between entities, with faster characters acting earlier. Additionally, it affects the party member's hit accuracy and evasion to enemy attacks.
Luck
Luck (運の強さ, Un no tsuyo-sa)? or Lu (運, Un)? affects the chances of dealing critical hits, inflicting status effects, inflicting instant-death skills (such as Hama and Mudo) in addition to evading those conditions when inflicted from an enemy. Additionally, if an enemy is Confused, the amount of money they will scatter is influenced by the user's luck stat.