Characters in The Viking Symbol Mystery

Frank Hardy

Also in Crawling with Zombies, Deadly Strategy, Time Bomb, At All Costs, Break-Up!, Deception on the Set, A Figure in Hiding, The Twisted Claw, Showdown at Widow Creek, The Disappearing Floor

Joe Hardy

Also in Crawling with Zombies, Deadly Strategy, Time Bomb, At All Costs, Break-Up!, Deception on the Set, A Figure in Hiding, The Twisted Claw, Showdown at Widow Creek, The Disappearing Floor

Chet Morton

Also in The Disappearing Floor, The Mystery of the Flying Express, The Clue of the Broken Blade, The Melted Coins, The Sign of the Crooked Arrow, The Secret of the Lost Tunnel, The Wailing Siren Mystery, Secret of Pirates' Hill, Mystery of the Desert Giant, The Vanishing Thieves

Caribou Caron