There was a mod for Oblivion that had you go on a quest to "make" a sword with a soul inside of it. There were a few new characters that you could pick from (all voice acted, they were all pretty comical) and the newly created weapon would occasionally speak when performing various actions- Sheathing would cause the sword to say "Awwwww" etc.Attacking would cause the sword to yell and shoutAnother example is the weapon Bane from Borderlands 2. Despite being a very annoying voice, it fits what I'm describing perfectly. I have absolutely no modding experience so I'm just putting the idea out there, hopefully for someone to pick up! If someone decide to take up construction of a mod like this, then I'm happy to help any way I can!