Barley has played a role in the story since the beginning, as part of Demeter’s corporate moniker “Barley Mother.” Historically it is one of the first ever crops cultivated by humans.

It is a grain farmed on Demeter’s land and used in cereal (and perhaps other products) in Olympus. It’s production is part of her corporate power and influence. It’s likely been in many of Demeter’s headpieces and earrings throughout the series.

Seeing it in a headdress for Persephone in episode 192 was particularly interesting. This is a time where she is dirty and tired, having worked 10 years and never passing Zeus’ inspection.

Could her barley headdress and green hands symbolize Persephone trying her best to do Demeter’s work, while sacrificing her own destiny/purpose?