yes creating inanimate objects which a spirit can inhabit or posess is very common djinns lamps or bottles, the brazzen vessel of king solomon and in part whenever someone ask the powers of the moon to bless water they ask for the spirits of the moon to bless or fill the water with there power. Essentially its a really simple ritual process and only requires dedicating the item to the spirit and altering it so it can easily be posesse by the spirit which usually entails either putting sigils or seals on the object or bathing/inserting fluid condensers within the object.
but as far as this spirit josiah do you know if its a shadow that follows you or does it protect, guard/empower you?