One of Valka’s dragon rescues, Gruff was blinded by a tree snare left by a band of Drago Bludvist’s trappers.
Fortunately for Gruff, Valka and Cloudjumper located him during one of their dragon raids and freed the sightless Hobblegrunt, along with several other dragons. In fact, it was during this daring dragon “jailbreak” that Valka called upon her Bewilderbeast to destroy the trappers’ fort, obliterating it in a blast of green ice and dispersing several of Drago’s underlings, including Eret Son of Eret.
Despite his inability to see, Gruff still lives a happy and productive life in the Bewilderbeast’s arctic nest, thanks to the large fin crowning his head. As with other Hobblegrunts, this fin allows Gruff to sense his surroundings and react to oncoming threats or obstacles a split-second before sighted dragons!
See more of Gruff in:
How to Train Your Dragon 2
Not only is he sensitive to shifts in the moods of the dragons around him but, thanks to Valka’s tutelage, Gruff can now subtly affect those dragons emotional states. By altering his coloration and vibrating his crown, Gruff can send out a soothing signal to calm irritated dragons or whip them into action during an attack on the dragon mountain!