The 18-year-old midfielder made all of his appearances for Hamlet last season from the substitutes bench, as they won promotion to National League South for the first time in their history.
He is a product of the Aspire Academy.
Manager Hayden Bird told https://www.mersthamfc.com> “Caio is a real prospect who will improve our squad. He is young but he is ready.
“He has already won the trust of the players in training”.