Neon is a secretive Lathander Cleric that helped the players rescue the prisoners from the Vecnan cult. He claims to have shut down the rising Ashmadai cult of Asmodeus in Neverwinter by passing on information to the town guard. Remembering Neon, the guard decide to hire him for the operation to rescue the 4 kidnapped citizens.
Before getting banished into the Shadowfell Vecna insulted each of the players but none of his insults fit Neon’s description.
After being banished into the Shadowfell, Varin confronted Neon and told him to tell the party who he really was. Turns out he was a Warlock who had lied about being a Lathander Cleric. Furthermore he dismissed his disguise and a dark blue skinned tiefling with ram style horns and religious ornaments decorating his body and clothes was revealed.
Neon revealed himself as a member of the Athar after he had a discussion Varin and Rix about gods.