Malebolge (Disgaea DFanon: A New Spin on Darkness)

Malebolge is a demonic sewer that has come to be inhabited by the homeless. It was the residence of Aaron until he was conscripted into The Conspiracy by Sicily.

Though its de jure sovereign may be Overlord Laharl, its de facto ruler was Tiara before her sudden departure and then Pyroclasts of all people.