Hannah Spearritt - IMDb
Hannah Spearritt as Iris, the messenger Goddess of the Rainbow. Bubbly Iris is seen as an underfoot child by many of the other Deities-- and though she hides it well, that's often what she feels like. But then her best friend is kidnapped, dragged to the Underworld, and few of the others seem concerned. Zeus doesn't want to go against his brother, and so ignores Demeter's pleas. Finally, Iris decides the only thing to do is travel to the realm of the dead herself, and bring Persephone back...