According to the plot of the cartoons, Ariel is the daughter of King Triton, and Hercules is the son of Zeus. King Triton is the son of Poseidon, who, according to Greek mythology, is the brother of Zeus. This makes Hercules and Ariel close relatives.
YYY: According to Greek mythology, which is the primary source, on the Olymp there is continuous corruption and bloodshed.