Amadio (アマディオ) is a member of Cosa Nostra and subordinate of Ronnie the Jaws.

He is a young Italian man with a large build, pale skin, and short receding light-colored hair. He wears a light-colored dress shirt.

When Rock, Revy and Feng visited Ronnie's office at Visconti Foods, Amadio was present in the room. Because Rock and Feng claimed that they possessed the money laundering account that Cosa Nostra wanted, Ronnie threatened to torture the info out of them and ordered Narciso to give him his favorite monkey wrench. Once Narciso retrieved the wrench, Amadio asked his boss if he could do the job as soon as possible because he needed to carry out his collection run. Telling him to hold on, Ronnie was intrigued about Rock's clarification that the account could still be used. Because Ronnie agreed to make a deal with the ex-salaryman, Amadio abandoned the interrogation and left to do his collection run.