Lors
An alien Firstspacer who assumes Nick Danson's identity after a crash.
Beth Danson
Nick's wife, whose trust and attraction make Lors's impersonation emotionally consequential.
Nick Danson
The real human whose temporary removal makes the substitution possible.
Nolan Brice
A dangerous human investigator whose pursuit threatens the alien operation.
Cartwell / Nesso
An alien operative maintaining cover within the investigation.
Commander Imry
A leader within the extraterrestrial mission.
Jela
Lors's alien partner and emotional connection to his own world.
Narvi
Another member of the off-world group managing the crisis.