Laharl's Castle

Laharl's Castle is the hub of the game Disgaea: Hour of Darkness

Players can

1) Buy weapons and other items from the two Rosen Queen Company Branches

2) Access the Dark Assembly

3) Talk to various vassals

4) Access the Item world

5) Visit the Hospital

6) Visit the Music store

7) Talk to the dimensional guide to go to the battle field

Etna's Secret Room
Etna's secret room can be accessed by pressing two switches in the Castle:

1) Behind the Throne in the Throne room

2) The skull placed at the Rosen Queen Counter

Simply approach these places and tap the X button

After pressing the two buttons go to the prinny who keeps saying that he feels a draft. Behind him is Etna's Secret Room.