It had always been claimed that weapons were a warrior's best friend. Indeed, it was not untrue at all, as a weapon that allowed one to exert their power to their limits was no less than a good companion with whom they have bonded in spirit.
Therefore, by basing upon that statement, there would always be some who would try their best to create weapons that were self-aware and possess a spirit, skipping the phase where the warrior would break it in to arrive at the highest level that was connected mind and spirit.
Still, it was not to say a weapon that could genuinely bond with a wielder in mind and spirit would naturally be considered the 'best friend' and would allow the wielder to unleash their greatest abilities—because the weapon possessed a will now, and it would therefore no longer be merely the warrior picking the weapon, but the weapon picking its owner too.
