The other dimension, what is it?

I haven't read the area boss speech, nor do I often remember things well from quest lines I did a long time ago, but wasn't pianus also banished from someplace because he ate his friend? Something stronger than him banished him here. Question is, who is stronger than pap and where do they come from? And from the sounds of it, this person/thing could be good, or it could be evil but just following the laws of his/her/it's land.

If I recall correctly Pianus was banished from heaven.