Ursa

History
Princess Ursa is the wife of Ozai, mother of Prince Zuko and Princess Azula, and granddaughter of Avatar Roku and Ta Min. It is shown that she is very protective of her son Zuko and may be one of the only members of the Fire Nation royal family (along with Uncle Iroh) who loves him. Shortly after the death of Iroh's son, Lu Ten, her husband Ozai asked his father, the Fire Lord Azulon, to pass Iroh's birthright to the throne to him. Ozai considered Iroh an unworthy quitter who let the death of his son get in his way of conquering Ba Sing Se. This dishonorable request only infuriated Azulon, who declared that Ozai would be fittingly punished for venturing to betray his own brother in his time of sadness. It is unknown what exactly this punishment was or if it was even carried out, though Azula told Zuko that it was to have him killed so that Ozai knew how it felt to lose his own first-born son. By the next morning, Ursa had disappeared, Azulon was proclaimed dead, and Ozai was announced as his willed successor. It is unknown what part Ursa had in these scandalous events, but it is almost certain that she played a major role in protecting Zuko. In Ursa's final appearance in the flashbacks, she wakes Zuko before her departure to remind him of her love and to tell him to always remember who he was, no matter how things seemed to change, just before pulling her hood over her head, and walking away into the shadows.

Trivia

 * "Ursa" is Latin for bear, which is likely a reference to how protective she is of Zuko, and it may have some insight on her role in the events.
 * Avatar Roku is Ursa's grandfather, making both of Zuko's great-grandfathers Fire Lord Sozin and Avatar Roku.

But She Still Lives