Aerith shoots her little magic blasts too. I think it even does a tiny amount of damage.It actually gives me vibes of breath of fire 4 with that game's backline system. I always wished more jrpgs would do stuff like this. Persona 5 also dabbled with it with teammates randomly taking potshots at the enemy.
I'm assuming Red XIII and Tifa don't actually do anything, but I'll keep any eye out for Tifa shadowboxing.