Clio and Dionysus are half siblings, Dionysus is the son of Persephone and Zeus, and Clio is the daughter of Hades and Persephone. Right now Clio is only just a baby, and Dionysus is only 7 years old. Persephone decided to let Dionysus hold Clio for the first. Dionysus is staring at her in his arms with wide eyes, not full comprehending this since he's only quite young.