The dragon Drogon is a symbol of Daenerys as a Targaryen
Animals in the series “Game of Thrones” symbolize not only Houses but also characters themselves. For example, the dragon Drogon is a symbol of Daenerys as a Targaryen. When Daenerys' actions do not match the character and instincts of a dragon, she destroys the legacy of Aegon the Conqueror.