Main Characters:
Hiccup - Toothless
Loki - Father
Sigyn - Mother
Thor - Uncle
Odin - Grandfather
Sif - Aunt
Astrid - Stormfly
Fishlegs - Meatlug
Snotlout - Hookfang
Ruffnut - Barf
Tuffnut - Belch
Valka - Cloudjumper
Stoick The Vast
Gobber
With:
Heather - Windshear
Dagur - Shadow Master
Drago - The dragon "Conquerer"
Selena - The evil Witch
Threya - Selena's Little sister who is bound to help Hiccup
Trader Johan
Dragons:
Sharpshot - Male Terrible terror
Twist - Female Terrible terror
Sky - Baby Terrible Terror
Wind Storm - Sea shocker
Breeze - Deadly Nadder
Aqua - Scauldron
Speed twirler - Whispering death
Thunder Shock - Thunder Drum
Vulcan - Gronkle
Glint - Flightmare
Glider - Skrill
Melody - Death Song