Inside the Walls of Erebus, there are multiple rooms. Mainly, the ghouls sleep there. Being undead and all, they don't really need the basic necessities when they were humans. It was their reward for working.
In one of them, there's a special room near the gate and this is where Cerberus brought Joren in.
Underneath a red light, there was a table and two chairs opposite each other. Joren knew where this is going so he sat in one of the chairs.
"Hey! That's our chair!" the second head shouted, obviously the hot-blooded one.
"Oh, sorry." Joren immediately stood up and went to the other chair.
"Hey, that's our chair too!"
"Eh?"
"Kakaka!" the second head then laughed which the first head tried to explain.
"He's making a joke, don't worry about it, you can sit anywhere."
Joren tried to process the joke.
"Oh, yes, technically, these are your seats." he nodded with a pitying smile.
"Ehem…!"
The second head harrumphed, knowing that his joke failed.