A historian in a vacc suit.
A well-dressed and distinguished (if somewhat gaudy) looking historian. Shadow is curious about the universe and wants to see the sights advertised by the cruise. Shadow is friendly and outgoing. He may entertain passengers by posing as a fortune-teller. He also knows some pretty crazy and wild stories, that he swears are true. But he is definitely a very mysterious individual, and you get a feeling that there is much about him that you do not know.
You don’t know anything about Shadow’s Background yet. If you are really curious, you might try asking him. You do know that Historians are a mysterious race with an unquenchable thirst for knowledge.