@zz2000 @QueenKumQuat It
could be Apophis or the Egyptian god of the Moon,
or it could be Set's father, god of the sky (his mother is the god of the earth), which would explain the character saying "my little Set" along with him flying like he can't touch ground. He seemed
familiar with Set from a parental standpoint. The four's parents were separated by order, so it's possible that the Dad would have reason want to cause issue. Another, obviously, would be the great snake that ate the sun, though, I'm not sure because of the flying part and the way that he said it sounded somewhat parental. Though, I'm obviously not sure.
@ChonChin that's why I expect it is their father, the god of the sky.