Xing, the child conscript, finds himself elevated to Colonel of the 11th Regiment by Fire Lord Ozai himself. This promotion is no simple reward; it's a calculated move by a pragmatic Fire Lord who recognizes a potent weapon despite Xing's low birth and "unlawful" assumption of command. The scene crackles with tension as Xing, barely concealing his bitterness towards the incompetence that caused so much loss, curtly answers Ozai's questions. His "uncles"—Colonels Dao, Koda, and Sho—form a protective triangle around him, deflecting the court's whispers and demonstrating the deep loyalty he commands within the military. This support network, forged in shared hardship, is Xing's immediate shield against the cutthroat politics of the capital. However, Princess Azula, a sharp-eyed force of nature herself, watches from the shadows, her initial surprise quickly giving way to a calculating frown. She sees through Xing's humble facade, noting the "iron resolve" in his eyes, and marks him for "investigation." The newly minted colonel has gained power, but also the dangerous attention of the Fire Nation's most formidable princess.

Xing wastes no time using his new rank to rebuild his decimated 11th Regiment with trusted officers like Ren, Mozi, and Kai. His true colors—a blend of ruthless loyalty and strategic brilliance—are immediately displayed in a chilling night raid on Duke Cho's estate. This is no mere punishment; it's a brutal, methodical act of vengeance, with Xing personally overseeing the prolonged torture and execution of the Duke for his role in Shiluo's idiocy and the deaths of "his brothers and sisters." The scene is a visceral gut-punch, revealing the depth of Xing's devotion to his regiment and his willingness to commit unspeakable acts for them. Princess Azula, far from being horrified, confronts Xing and applauds his actions, recognizing the strategic value of eliminating corruption and sending a message to spineless nobles. She then challenges him to a spar, ostensibly to test his competence. Xing initially holds back, but Azula's taunt about replacing him unleashes his true, devastating "white flames" and unique close-quarters combat style, culminating in an "Atomic Breath" that obliterates the training ground. Shocked but deeply impressed, Azula grants him her royal patronage, solidifying his position and drawing the Fire Lord's calculating interest in "tying this commoner colonel to the royal family." Xing has secured powerful allies, but at the cost of being inextricably linked to Azula's ambition.

Xing's strategic vision expands beyond Fire Nation conquest. He secretly meets with Prince Iroh, who, recognizing Lidai's White Lotus connection, offers subtle guidance. Xing's suppressed fury at courtly "petty games" is evident, hinting at a deeper, personal agenda. His visit to Kyoshi Island sees him warning Suki about the Avatar's return and Zuko's pursuit, and, remarkably, offering future "employment negotiations" to the Kyoshi Warriors, showing a long-term strategy of securing allies beyond the Fire Nation. His most audacious move comes with his "Avatar-proofing" plan: following a hint from King Bumi, he finds a dead dragon's lair, discovers intact dragon eggs, and uses his unique chi channeling to revive two. This revelation of his spiritual power is immediately followed by a daring confrontation with King Bumi himself, where Xing's "Atomic Breath" stalemates the Mad King, leading to a secret alliance and Bumi's "surrender" of Omashu. Back in the capital, Xing executes a brilliant deception: he presents Ozai with fake dragon eggs, which the Fire Lord "destroys" to claim the title of "dragon killer." Ozai, oblivious, promotes Xing to "First Royal Champion" and grants him a boon: the right to claim any Earth Kingdom state he personally conquers. The true baby dragons are then revealed to Azula, along with Xing's brutal honesty about Ozai's monstrous parenting. This emotional gut-punch shatters Azula's composure, forging a profound, vulnerable connection between them, and setting the stage for their intertwined future.

Admiral Zhao's wasteful invasion of the Northern Water Tribe looms, a grand, glory-seeking endeavor that Azula despises for its futility. Meanwhile, Zuko, "presumed dead" after Zhao's attack on his ship, is secretly healing under Iroh's care, driven by a desperate need to reclaim his honor by capturing the Avatar. Xing, anticipating Zhao's disastrous plan to kill the Moon/Ocean spirits, stows away with Colonel Hwa's company, acting against Fire Nation orders to intervene. At the Northern Air Temple, Xing reveals another facet of his unique power: using his chi channeling, he miraculously heals Teo's paralyzed legs, a dangerous application of his "spirit-touched" abilities. This act of compassion, coupled with his offer of aid to the refugees, showcases his moral complexity. Back in the capital, Azula, now Colonial Minister, ruthlessly navigates court politics, building a loyal faction and implementing policies that subtly undermine her rivals while benefiting the colonies. The combined pressures of Zuko's banishment, the invasion, and Xing's stark revelations about Ozai's parenting force Azula to confront her own emotional repression. She breaks down, finding genuine comfort and understanding in Xing's arms, finally shedding her mask and accepting his affectionate "my princess." The baby dragons further cement their bond, with one choosing Azula as its companion. This period marks Azula's profound emotional and political awakening, intertwining her destiny with Xing's secret plans and the fate of the dragons.