☆ He's a member of Passione

☆ (this info below is from the Jojo wiki)

Leone Abbacchio (レオーネ・アバッキオ, Reōne Abakkio) is a major ally featured in Golden Wind.

Abbacchio is an ex-cop and currently a member of Passione and by extension Bucciarati's team. He accompanies Bucciarati and Giorno Giovanna on their mission to protect Trish Una.

Abbacchio is a Stand User but mainly uses his Moody Blues to support the group through its investigative ability.