All righty, we've got character classes sorted! No serious dupes or conflicts so it looks like the crew stands as follows:
ROGUE TRADER: Rudy. All hail the Lord-Captain! All hail profit and fame!
SENESCHAL: Denis, the sneaky bastard.
NAVIGATOR: Surely Myke shall guide everyone through the terrors of the Immaterium. Please ignore his hideously mutated corpus.
ASTROPATH TRANSCENDENT: Blackheart's psychic signals shall echo across the universe.
ARCH-MILITANT: Aeryk's weapon arm will render into bloody gibbets those who oppose your bloody path.
EXPLORATOR: Enron, made of meat and mechanics. He will appease the machine-spirits.
Next step is super easy (attribute generation). Grab your d10s!