The episode opens with Machu and Nyaan dealing with the aftermath of their encounter with immigration police. They decide to split up to avoid further trouble. Machu is soon cornered by Lt. Xavier Olivette from the Sodon, a military faction, putting her in a precarious position.

Meanwhile, Nyaan takes over piloting the GQuuuuuuX mobile suit in the next Clan Battle match. At first, Nyaan struggles because Shuji, their usual teammate and pilot of the Red Gundam, is visibly sick and unable to perform at his best. Despite this disadvantage, Nyaan begins to tap into a mysterious power known as the "Kira-Kira," which Machu had previously mentioned but Nyaan did not understand.

During the battle, Nyaan's frustration grows, and in a moment of anger, he kicks the Haro (a small robotic companion). This action unexpectedly unlocks the Omega Psycommu system within the GQuuuuuuX, granting Nyaan access to the Kira-Kira ability. This power dramatically enhances his combat effectiveness, allowing him to outmaneuver and overpower the opposing pilots Gaia and Ortega, former officers of the Black Tri-Stars who seek revenge against the Gundams.

Nyaan's newfound skill leads to a decisive victory where he defeats and kills both Gaia and Ortega. This outcome shocks Machu, who is both astonished and jealous upon discovering that Nyaan was the pilot responsible for the win. This event marks a significant turning point, as Nyaan eclipses Machu's abilities and challenges her worldview.

Parallel to these events, Machu reflects on her complicated feelings about Shuji, whom she witnessed killing an opponent in a previous battle. She remains determined to join Shuji in their goal of reaching Earth despite her doubts and insecurities.

The episode also touches on the legacy of the One Year War, revealing that many former aces like Gaia and Ortega were left to fend for themselves after the war ended, forced into Clan Battles to survive. This background adds depth to the motivations of the antagonists and the ongoing conflicts.

The episode closes with a subtle foreshadowing of future revelations involving the "La-La Song," a mysterious melody connected to the Kira-Kira and hinting at the involvement of Lalah Sune, a legendary figure from the original Gundam series. This connection suggests deeper mysteries to be explored in upcoming episodes.

At the end of Mobile Suit Gundam GQuuuuuuX Season 1, Episode 5, titled "Nyaan Doesn't Know About Kira-Kira," Nyaan unexpectedly takes control of the GQuuuuuuX Gundam during a critical Clan Battle, manifesting latent Newtype abilities known as the "Kira-Kira." Despite her inexperience, she outperforms expectations, coordinating effectively with Shuji and ultimately killing their opponents, Gaia and Ortega. Machu, sidelined by illness, watches as Nyaan eclipses her, highlighting a shift in their dynamic and the stakes of the conflict.

The episode opens with Machu unable to participate in the Clan Battle due to illness, leaving Nyaan to pilot the GQuuuuuuX Gundam for the first time. Initially, Nyaan plans to stay back and let Shuji handle most of the fighting, but when Shuji falls ill with a fever, Nyaan is forced into direct combat. She faces off against two veteran pilots, Gaia and Ortega, who are former ace pilots from the One Year War era, known for their deadly teamwork and skill with Dom mobile suits.

Despite her lack of combat experience, Nyaan struggles under the pressure of coordinated attacks from Gaia and Ortega, who specifically target the GQuuuuuuX as the most advanced threat. As the fight intensifies and Nyaan grows more frustrated and hurt, she begins to manifest the "Kira-Kira" sensation--a Newtype ability that enhances her piloting skills and combat awareness. This sudden awakening allows her to pilot the Gundam with surprising competence, fooling everyone except Machu into believing Machu is still the pilot.

Nyaan's newfound abilities enable her to turn the tide of the battle. She coordinates effectively with Shuji, who recovers enough to assist, and together they overwhelm Gaia and Ortega. In a shocking development, Nyaan participates in killing both opponents, an act that is treated with little fanfare in the episode but marks a significant moment for her character, suggesting a darker turn or a loss of innocence.

Meanwhile, Machu, confined and unable to fight, experiences a profound sense of being eclipsed by Nyaan. Her worldview begins to crumble as she realizes Nyaan's potential surpasses her own, intensifying the emotional and interpersonal conflict between them. The episode closes with this tension unresolved, setting up future confrontations and character developments.

In terms of character fates at the episode's end:

• Nyaan emerges as a capable and deadly pilot, having fully tapped into her latent Newtype abilities and crossed a moral threshold by killing in battle.
• Shuji remains a key combatant but is weakened by illness during the fight, relying on Nyaan's support.
• Machu is sidelined physically but emotionally shaken, facing the reality of being outpaced by Nyaan.
• Gaia and Ortega are killed in the battle, ending their roles as antagonists in this conflict.

This ending highlights themes of rivalry, the harsh realities of war beyond mere competition, and the emergence of hidden potential under extreme pressure. It also foreshadows deeper conflicts among the main characters and the moral complexities they will face.

The episode "Nyaan Doesn't Know About Kira-Kira," which is episode 5 of Mobile Suit Gundam GQuuuuuuX Season 1, does not have a post-credit scene. According to a detailed source reviewing the film and series, there are no extras or scenes after the credits in this episode or the related film content.

The episode itself ends with significant plot developments involving Nyaan discovering new truths and Shalia contacting Granada about a new mobile suit, but these occur before the credits, with no additional scenes following them.

Nyaan's mastery of the Kira-Kira ability is triggered during a desperate moment in battle when she becomes frustrated and even kicks the Haro, which unexpectedly unlocks the Omega Psycommu system for her. This activation allows her to manifest latent Newtype abilities and pilot the GQuuuuuuX competently, surprising everyone including Machu who had previously been the primary pilot associated with Kira-Kira.

Machu experiences a crisis of confidence as Nyaan outshines her at every turn, especially after witnessing Nyaan's sudden proficiency with the Kira-Kira and her deadly fighting skills. Machu realizes she has a lot of catching up to do, especially after seeing how Shuji Ito surpasses her in Clan Battle, which intensifies her fear of being left behind or becoming irrelevant.

The Haro, originally belonging to Anqi, plays a mysterious and crucial role in unlocking the GQuuuuuuX's Omega Psycommu system. Both Machu and Nyaan have had their Gundam abilities unlocked through interactions with this Haro, suggesting it holds a secret capability to override Zeon's top-secret technology, hinting at deeper plot elements involving the Haro and possibly Shuji's pet.

Shiiko Sugai, a Federation veteran known as the Witch, joins a Federation-funded team to seek revenge against the Red Gundam's pilot, Char Aznable, who killed her partner in the One Year War. During the battle, her Newtype powers synchronize with Shuji's, revealing that the pilot inside the Red Gundam is not Char. Despite this, she attacks Shuji but is ultimately killed by him. Before her death, she learns something about Shuji's true motives, adding complexity to his character and the story.

Nyaan's participation in killing opponents, including joining Shuji in killing Gaia and Ortega, is surprising given her previous characterization. The episode downplays the gravity of her actions, which could be a deliberate red flag indicating a darker or more complex side to her character. This moment marks a significant turning point in her development, showing her transition from a novice to a formidable and potentially ruthless fighter.

The episode "Nyaan Doesn't Know About Kira-Kira" from Mobile Suit Gundam GQuuuuuuX Season 1 contains some dark and intense themes that may not be fully suitable for very young children or highly sensitive viewers. It features emotional and psychological tension, including jealousy and romantic pressure among teenage characters, as well as violent confrontations related to illegal mobile suit dueling and security enforcement. There are scenes involving physical altercations, such as a character kicking a security guard in a sensitive area, and moments of characters stripping down while lying on a Gundam, which might be uncomfortable or inappropriate for younger audiences. The episode also marks a significant turning point with consequential and potentially upsetting events that deeply affect the characters' emotional states and relationships.

In summary, while the animation and storytelling are praised, the episode includes mature themes, mild violence, and suggestive content that could be objectionable or upsetting for children or sensitive viewers. Viewer discretion is advised.