Drago Bludvist is the main antagonist of the DreamWorks animated How to Train Your Dragon franchise, serving as the main antagonist of DreamWorks' twenty-ninth full-length animated feature film How To Train Your Dragon 2, the overarching antagonist of the Netflix computer-animated TV series Dragons: Race to the Edge, the posthumous antagonist of DreamWorks' thirty-sixth full-length animated feature film How to Train Your Dragon: The Hidden World and a posthumous antagonist in How to Train Your Dragon: Homecoming.
He is a cruel, aggressive, treacherous, cunning, vindictive, hateful and megalomaniacal warlord who sought to amass a massive army of men and dragons by enslaving dragons with the Muddy Bewilderbeast. He uses his domineering traits to convince entire tribes of chieftains to follow him before proceeding to dominate humankind in a reign of terror. He is Krogan, the Warlords and the his army's former leader, the Muddy Bewilderbeast's former master, Eret's former boss, one of the archenemies of Hiccup as well as Valka, and the killer of Stoick the Vast.
Supposedly, when the man who became later known as Drago Bludvist was little, his village was attacked by dragons and his family was killed. He managed to escape but not before losing his left arm. From that point onwards, he lived in fear of another dragon assault until he vowed to himself to rise above his fear and conquer the beasts that had hurt him, becoming a power hungry tyrannical warlord.
Years ago, there was a great gathering of chieftains to discuss the dragon scourge they all faced. Into the mist came a stranger from a strange land, covered in scars and draped in a cloak made of dragon skin. He carried no weapon and spoke softly, saying that he, Drago Bludvist, was a man of the people, devoted to freeing mankind fled that he once lived with a fear of dragons as a little boy, and had supposedly lost his home, his family and his left arm to them. Vowing to "rise above his fear" once and for all, Drago grew up learning how to control dragons with brute force and gathered an army of loyal humans under the guise of a "Dragon God", one who had absolute control of dragons.
Years before the events of the first movie, Drago visited a then dragon-terrorized Berk in an attempt to sway more people to his cause. He entered the Great Hall where an assembly of chiefs was present, promising them peace and freedom from the threat of dragons, but only if they chose to bow down and follow him. The chiefs took this for a joke and rejected his offer by laughing at him.
Enraged by this, Drago left the hall calling back to the chiefs, “Then see how well you'll do without me!” Moments later, two of Drago's armored dragons descended into the hall through the roof and burned it to the ground, killing all the chiefs except for Stoick, who narrowly managed to escape with his life. Stoick then saw Drago with his right-hand, Krogan, before they left the scene.
In spite of his failed attempt to recruit Stoick and his fellow chiefs as his followers, however, Drago ultimately went to gain the trust of Ragnar the Rock, Griselda the Grievous and Chaghatai Khan, three ruthless warlords from Glacier Island who opted to follow him so they could control all dragons and conquer the world with them.
And he is reprised by Djimon Hounsou in the English dub and his Japanese voice is unknown.