"The little serpent has left, and the great serpent has come."
Asteriel Ernelis is the strict and battle-hardened elder and leader of the Viridian Wardens. All wardens wear the hides of their greatest hunt; it is Asteriel alone who wears the hide of an opha.
Asteriel was very guarded about allowing the heroes into the hidden tree city of Ti’oakana, but after they slew the feral couatl, the elder warmed up to them a bit.
Since their initial meeting, there has been little contact with the elder. Asteriel did refuse help for the journey to the Valley of Chains—a command which Kellam disobeyed.