Something that isn’t explained too well in the Persona 5 is what the stats of each persona does. Each persona you equip has five stats, and when you equip them, that becomes your stats in combat. The only stats that don’t change when switching personas is your HP and SP. You can train using the chair at home or go to to gym to increase those.
Strength – Determines your physical attack power.
Magic – Determines your magical attack power.
Endurance – Determines your defense, both physical and magical.
Agility – Determines the turn order and your chance to hit.
Luck – Increases your critical strike chance as well as status effect chance.