Known role
Orpheus is tied to the 1915 setup and helps bring Makoto into the underworld of Kokura, Fukuoka. He also appears connected to Makoto's early survival and musical discovery.
Answer
Snoop Dogg portrays Orpheus, a charismatic smuggler.
Orpheus catches Makoto Daito and Yu Shinjo after they stow away on a ship bound for Japan. Rather than functioning as a throwaway cameo, the Xbox recap describes Orpheus as a substantial early presence in Makoto's story.
What to watch next
Future trailers and interviews should clarify how often Orpheus appears, whether he returns beyond the opening voyage, and how his role connects to Makoto's music and underworld arcs.