Sigrid is Smog's trainer and owner. He first met Sigrid when he was separated from his pack and eventually decided to join her group. He is very loving and affectionate to Sigrid and almost always vies for her attention, much to Voltage's annoyance. Though he does get distracted by shiny metal objects, when brought back to his sense, he will return to Sigrid and help his friends.
Voltage is Sigrid's primary dragon and often Smog's rival in Sigrid's attention and affection. The two have a small rivalry when it comes to Sigrid, but both care about her nonetheless and would do anything to help her. Most often, if Smog gets into trouble or breaks something, he tries to blame Voltage, resulting in the latter's anger.