Gormless is the Swordfighting instructor in the Hooligan's Pirate Training Program for Viking novices as he is "the best sword-fighter in the Hooligan Tribe." He also teaches extra lessons for Hiccup, outside the Training Program to enhance Hiccup's natural ability.
No description is given of Gormless the Grim, other than that he is an adult male. It might be assumed he has facial hair as is typical for Hooligans.
|"How to Train Your Dragon":||Absent||"How to Ride a Dragon's Storm":||Absent|
|"How to Be a Pirate":||Absent||"How to Break a Dragon's Heart":||Absent|
|"How to Speak Dragonese":||Mentioned||"How to Steal a Dragon's Sword":||Absent|
|"How to Cheat a Dragon's Curse":||Absent||"How to Seize a Dragon's Jewel":||Absent|
|"How to Twist a Dragon's Tale":||Absent||"How to Betray a Dragon's Hero":||Absent|
|"A Hero's Guide to Deadly Dragons":||Absent||"How to Fight a Dragon's Fury":||Absent|
- According to Dictionary.com, 'Gormless' means "lacking in vitality or intelligence; stupid, dull, or clumsy." It is principally used in Great Britain, which is the author's country of origin.