Coy is the young guy who takes Kârinh from Le Havre to Paris when she arrives at earth. With his boat they travel the river Seine via Paris Tancarville to Paris Notre-Dame. Coy is born on the river Seine and likes to swim in its dirty water 1).
Coy seems to look a lot like Simon Lévy-Soussan in the Lighted World.
Read: Revoir Paris