Hookfang and Snotlout have a... complicated relationship.
Whereas most dragons obey their riders’ commands, Hookfang often enjoys doing the opposite of what Snotlout says. However, despite their occasional disagreements, Snotlout and Hookfang are both warriors at heart and work very well together in combat or competition with the other dragon riders.
See more of Hookfang in:
Dragons: Race to the Edge
Book of Dragons
Dragons: Defenders of Berk
How to Train Your Dragon
How to Train Your Dragon 2
Dragons: Riders of Berk
Incendiary in temperament and short on patience, Hookfang would rather ignite 1st and think 2nd
If cornered, the monstrous nightmare will coat itself with fire from nose to tail.