Drogon

Drogon is named for the khal on whose funeral pyre he and his brothers were born, and the fire in his temperament suggests the name was well chosen. Of the three dragons hatched that night outside Vaes Dothrak, he grew fastest and strayed farthest — the first to leave his mother's sight for days at a stretch, and, in the novels' telling, the dragon responsible for the fighting-pit death of a child that ultimately saw his brothers chained beneath Meereen while he himself flew free of the consequences entirely.

By the close of the published novels he has carried Daenerys clear of a city she never wanted and out over the Dothraki sea, unbroken, largely unbiddable, and by every indication still growing — the single loudest promise the story has made and not yet redeemed. The Citadel, mindful that this is a tale still being told rather than a history already settled, offers no verdict on where that flight ends, and treats everything past this point as belonging to pages not yet written.

Woken into the world alongside two brothers after a century and more of empty skies, and by the novels' own account still very much alive and only growing more dangerous — a story the chronicle keeps open rather than closed, as befits a beast whose ending George R. R. Martin has not yet written.