|Fate||Living on Berk|
|Appearances|| Night Riders|
Smog was originally part of a pack of Smothering Smokebreaths. He was separated from his pack and ran into Sigrid Henderson and her dragon Voltage. Sigrid took the Smothering Smokebreath in and named him "Smog".
Since joining the group, Smog has displayed a playful personality with Sigrid and often vies for her attention, much to the annoyance of Voltage. Additionally, he is a bit of a kleptomaniac and is easily distracted by shiny metal objects.
When Sigrid and Voltage were recaptured by the Stormchasers tribe, Smog alerted her traveling companion Velius Flynn who organized a rescue mission. Though the mission was successful, Flynn's dragon Shimmer died in combat.
Following this, Smog moved to the Haven with Sigrid and Voltage to live with Flynn.
Several years following this, the Berserkers launched an invasion of the Haven. With no other option, Flynn and Sigrid agreed to contact the Berk Vikings for assistance. Smog was sent with a letter and returned to the Haven, bringing Hiccup and his riders with him. After a successful evacuation, Smog began living on Berk with Sigrid.