Superman has Lois Lane, Spiderman has Mary Jane, Mario has Princess Peach, and Perseus has Princess Andromeda. Like pretty much every hero ever, Perseus has a ladylove who he's willing to face down any villain for. No adventure story is complete without a little romance thrown in, and the episode of Perseus and Andromeda is one of the most famous love affairs of all time, a classic story of love at first sight. This story also brings in questions of familial love, when King Cepheus decides to sacrifice his daughter in order to save his kingdom.
At the beginning of the tale, Andromeda is about to be fed to the Cetus, a sea monster. Her father and mother have decided to sacrifice their daughter so that their kingdom can be saved. The idea of sacrificing a virgin or a beautiful maiden remains a pretty common story element in literature and popular entertainment today. In King Kong, the natives try to sacrifice the beautiful girl to everybody's favorite giant ape. In Indiana Jones and the Temple of Doom, love interest Willie Scott is almost sacrificed by the bloody cult that Indi is up against. The sacrificing-the-helpless-girl trope does seem a bit dated, we have to admit. Still, the challenging decision about whether it's okay to sacrifice a loved one for the greater good never gets old.
Sadly for modern readers, women don't come off so great in the story of Perseus and Andromeda. The whole sea monster disaster starts because of Cassiopeia's vanity, which is a bummer. And Andromeda is mostly just a beautiful, passive damsel-in-distress character. When Perseus saves her from the sea monster, she becomes his wife and his reward for bravely fighting the creature.