Hel - is a ruler pf the inderworld. her name is no coincidence. Daughter of Loki, there is a tale about the revival of Balder where she only consent Balder's release of everyone wept Balder's release if everyone wept for him. There was only a single Giantess who didn't, very likely it was Loki in disguise.
Since the ancient times gods warred with each other, well, this isn't any news right? Regardless of what mythology, there is always one thing in common, conflict. Those stories were created to exemplify the human nature, the aggressive ego they had could only lead to destruction and war. Stories of how Zeus temper destroyed nations, how Izanagi couldn't handle Izanami after her beaty was taken away, or Set murdering his brother Osiris.