what different application? you mean kata having superior hardening? Thats not different, thats just superior hardening.
And if luffy has affinity for this penetration haki by having hardening, zoro should then have the affinity as well, and everyone else that can use hardening tbh. Well if you want to make sense at least.
And if luffy has affinity for this penetration haki by having hardening, zoro should then have the affinity as well, and everyone else that can use hardening tbh. Well if you want to make sense at least.