Why Magical Girls Do Not Engage In Melee Combat

I do not understand why magical girls rarely use their magic wands as melee weapons. If Halo's Master Chief could use his guns as melee weapons in close quarters combat, then I do not see why magical girls do not use their magic wands for melee combat. Although it's possible that Sakura Kinomoto did use her magic wand to engage in close quarters combat at some point in time, her case may be the only known exception. And yes, Ash Ketchum's original nemesis Gary Oak is the stabbing victim in this comic.

Then again, magical girls were not meant to engage in heavy duty combat. Even worse still, there is a big chance that magical girls could lose their innocence if they have to brutally kill anyone, even if that enemy is a monstrous monster or villainous villain. Unfortunately, we have already seen cases of magical girls losing their innocence, and this is all the fault of Gen Urobuchi when he conceived Puella Magi Madoka Magica.