Lavos is the dwarven god of lava. Though quick to anger, he is reasonable and cares for the people of Ehbon. In his true form he is 600 ft tall and his body burns with molten lava.
In his mortal form he is a dwarf.
He first encounters the party when he almost steps on them by accident as he is traveling south through the town of Balamb (which he may not have noticed at all were it not for an intervention by The Stranger). He then spends the night dancing and getting to know the party a bit before continuing on with his journey south.