Shadechasers are light grey with dark grey backs and tails. Their spines and claws are black, while their eyes are light blue.
The Shadechaser's behavior of "chasing the shadows" may be a reference to the legendary wolf Hati from Norse mythology.
This wolf was said to chase the moon, represented by the god Máni, across the sky every day, thus causing it to seemly move across the sky. At the end of the world or Ragnarök, Hati will catch up with and kill Máni, but not before he has a baby to carry on his task. Hati's brother, Sköll, does the same with the sun, represented by the goddess Sól.