The famous Targaryen coat of arms, "Fire and Blood" with the three-headed dragon representing Aegon the Conqueror and his sisters, is an important and ancient symbol in the family's history. Here is an explanation of the information I provided with some additional details:
The Eternal Coat of Arms of House Targaryen
- The coat of arms, "Fire and Blood" with the three-headed dragon, symbolizes the strength and unity of House Targaryen. This coat of arms has never been changed by any Targaryen king before or since, including cruel kings like Maegor the Cruel.
Maegor the Cruel and Prince Aegon Targaryen
- In their war for the throne, Maegor the Cruel and his nephew Prince Aegon Targaryen used the same coat of arms, "Fire and Blood", even though Prince Aegon's army was made up of Lannister soldiers.
Queen Rhaenyra
- During the Dance of Dragons, Rhaenyra stuck to her family's coat of arms despite her desperate need for allies. She did not change any detail of the Targaryen flag to please any of her allied families or even for her love of her dragons.
Rhaenyra's Stance on Dragons
- Despite the Blacks killing four dragons, Rhaenyra never insulted any dragons or beheaded any despite threats. The dragons under her command included Dreamfire (the dragon of Aegon's wife Hylena), and Shrikos and Morgul (the dragons of Aegon's sons Jaehaerys and Jaehaera).
Queen Rhaenyra's Titles
- Rhaenyra's titles included "Joy of the Realm/Throne", "Dragon Queen", and "Half-Year Queen".
Aegon II
- Aegon II (the Usurper) changed the colors of the Targaryen flag to green to please his mother's family and grandfather the Hightower, whose emblem was green. He also changed the color of the dragon to gold because of his love for his dragon Sunfire.
Changing the Crest
- Aegon II claimed to fight for the family name and the continuation of their rule, but the first thing he did was to abolish the family motto "Fire and Blood" just to please his mother and grandfather the Hightower.
Insulting the Dragons
- The Greens insulted the symbol and power of the Targaryen family by cutting off the head of the dragon Melis and parading it through the streets of the capital to the people.
Aegon II's Title
- Aegon II's main title was "The Usurper", a title that reflects the way he seized the throne and the betrayal he committed against his family.