[@The One] I misunderstood, no of course your Memento Mori could be Banshee-Esque.
[@Tatsua Aiisen] They can act independent in the way that they can talk and voice opinions, but they are completely subservient to their host apart from possible snarky comments. They can't really leave their host and they give all their power to the host. They are basically the supernatural embodiment of their hosts death.