The Dysett region is one of the thirteen regions that surround Radiata City, although it is not directly connected to Radiata. The Dysett region is connected to the Septem region to the north-west and the City of White Nights to the west.
Depending on which side you chose at the split, you'll be fighting different people. If you chose the human side, you'll be facing Gawain Rothschild. If you chose the non-human side, you'll be facing both Gerald and Cross Ward.