Keeping Spirits is the act of keeping once living entities or spirits as companions or friends that are typically kept and bound to a vessel or yourself. Before everyone has a fit, No, this is not spiritual slavery for the most part.  I’m sure there are sellers who do bind spirits against their will but ethical sellers do not bind any spirits against their will. People often find it hard to fathom spirits being bound not being slavery. Spirit keeping these days is a mutually beneficial arrangement