Digital Devil Saga: Muladhara part three and Ground Zero

On the top layer of Muladhara, there's basically nothing apart from a few people to talk to. It is a good idea to talk to the random people you find - and talk to them repeatedly. Depending on where you are in the plot, what they have to say will change. Some of it is informative, some of it is odd, and some of it is just plain silly.

When you get to the exit and leave the area, a large selection screen will come up. You can choose between Muladhara, Ground Zero, and Svadhistana. Svadhistana is in blue because you've not been there yet.

Go to Ground Zero first. A message will pop up saying: "Serph and the party feel hungry... They grew weak from hunger." All this means is that Serph, Heat and Argilla have lost 3 HP from hunger - not worth using a ration on, even though since if you talk to the Member of the Embryon closest to you he will give you 5 Rations. There are a few more people you can talk to, as well, although none of them will give you more items. (BTW, the "feel weak from hunger" thing may happen throughout the game if you run around between areas often enough without fighting.)

Argilla: "Something happened here. I want to know what that was."
Heat: "Why was that woman here? Is she related to this marking?"

When you're done, leave Ground Zero and go to Svadhistana.

(PS: Ground Zero will disappear from the list of areas you can visit later in the game.)