WMG / Persona 5: The Phantom X

Merope is a human woman who was recruited to work in the Velvet Room.

Similar to the Demon Painter in Persona 2. This is how she can understand the human psyche enough to assign the Phantom Idols fitting Personas, and why Igor doesn't seem to know exactly what to call her at first, as she's not a creation of the Velvet Room like the other attendants.