Sentient Objects
Objects that normally should be inanimate possessing own conscience and intelligence such as: weapons, swords, books, grimoires, dolls, toys, castles, etc. Generally due to supernatural causes such as being reincarnated in objects; objects possessed by spirits; born a spirit within an object after it absorbs large amounts of mana, spiritual power, or emotions and desires of living beings as in the legend of the tsukumogamis; or even being a living being with able to transform into a functional object like a sword...