The episode opens with Shuji Ito and Amate Yuzuriha, known as the Pomeranians, continuing their winning streak in the Clan Battle arena, a high-stakes mobile suit combat league within their space colony. Their victories have drawn attention, and the episode quickly shifts focus as a new challenger arrives: Shiiko Sugai, a former Federation ace pilot nicknamed "The Witch," who has learned of the Red Gundam's reappearance in the colony. Shiiko, visibly haunted and driven by a personal vendetta, seeks out Anqi, who runs a junk shop that secretly serves as a front for the Clan Battle team, to gather information about the Red Gundam and its pilot. During this conversation, it is revealed that Shiiko's motivation stems from the death of her comrade and romantic interest, Mav, who was killed by the Red Gundam during the One Year War; despite having built a peaceful life with a husband and child, Shiiko remains consumed by grief and a need for revenge, unable to escape the trauma of her past.

Shiiko's arrival at the junk shop coincides with Machu's presence. Machu, a young and relatively inexperienced member of the team, is visibly shaken upon meeting a real veteran of war, especially one so deeply scarred. Shiiko, perceptive and hardened by experience, immediately senses Machu's connection to the Red Gundam and questions her directly about the pilot's identity. Machu, unable to hide her knowledge, becomes the unintentional link between Shiiko and the Red Gundam's current pilot, Shuji. Machu is both awed and disturbed by Shiiko's single-minded obsession, contrasting sharply with her own naivety and desire for a more exciting life.

Meanwhile, Shuji confides in Amate about his desire to use the money earned from Clan Battles to travel to Earth, a dream Amate supports. Their conversation is interrupted as Shiiko, having confirmed the Red Gundam's presence, issues a direct challenge to the Pomeranians for a Clan Battle, explicitly stating her intent to destroy the Red Gundam and avenge Mav. The team accepts, and preparations begin for the upcoming match, with tension mounting as both sides recognize the gravity of the confrontation.

The Clan Battle commences with Shiiko piloting the Galgoo mobile suit, a machine equipped with advanced technology and piloted with ruthless precision. The battle is depicted as more violent and intense than previous matches, with the animation emphasizing the weight and lethality of each attack. Shiiko's combat style is aggressive and unrelenting, targeting Shuji's Red Gundam with a series of calculated strikes designed to overwhelm even his enhanced Newtype reflexes. Shuji, initially caught off guard by the ferocity and skill of his opponent, is forced to dig deep, relying on his supernatural abilities to evade and counter. The fight is punctuated by moments where time seems to slow, highlighting the impact of critical blows and the pilots' heightened states of focus.

As the battle progresses, Machu watches from the sidelines, torn between admiration for Shiiko's determination and horror at the brutality of the conflict. She begins to idealize Shuji, projecting her own desires for escape and meaning onto him, while also forming a fleeting attachment to Shiiko, who represents a life far removed from her own mundane existence. The emotional stakes are raised as Shiiko's backstory is interwoven with the combat, revealing the depth of her loss and the futility of her quest for closure.

In the climax of the battle, Shiiko closes in on Shuji, her attacks growing increasingly desperate as she nears her goal. Shuji, pushed to his limits, manages to outmaneuver her with a combination of skill and Newtype intuition, delivering a decisive counterattack that disables the Galgoo. The impact is fatal; Shiiko perishes in the cockpit, her final moments consumed by the phantom of her past and the unresolved pain of Mav's death. The battle ends abruptly, leaving the arena in stunned silence.

In the aftermath, Machu is visibly affected by the violence and the death she has witnessed, questioning why someone who had found peace would return to war, and grappling with her own motivations for participating in the Clan Battles. Shuji and Amate, though victorious, are somber, the weight of the encounter lingering as they consider the cost of their ambitions and the cyclical nature of conflict. The episode closes with the team processing the events, the line between their constructed reality and the harsh truths of war now irrevocably blurred.

The ending of Mobile Suit Gundam GQuuuuuuX Season 1, Episode 4, "The Witch's War," concludes with a fierce Clan Battle between the Red Gundam pilot Shuji Ito and the veteran ace Shiiko Sugai, known as "The Witch." Despite Shiiko's relentless and ruthless attacks fueled by her obsession to defeat the Red Gundam, Shuji's supernatural abilities give him the edge, ultimately leading to his victory. However, this victory comes at the cost of Shiiko's life, marking a tragic and intense conclusion to their confrontation.

Expanding on the ending scene by scene:

The episode culminates in the Clan Battle arena where Shiiko Sugai, a former Federation ace pilot haunted by the death of her Mav (a close comrade or possibly romantic interest) during the One Year War, confronts the Red Gundam pilot Shuji Ito. Shiiko pilots the Galgoo suit and is driven by a deep obsession to destroy the Red Gundam, which she holds responsible for her Mav's death. Her combat style is ruthless and highly skilled, showcasing technology and techniques that rival even the new reaction speeds of younger pilots.

As the battle intensifies, Shiiko relentlessly pursues Shuji, attacking with precision and ferocity. Shuji, however, leverages his supernatural Newtype-like abilities, which grant him heightened perception and reaction, allowing him to counter Shiiko's aggressive tactics. The animation emphasizes the deadly nature of their combat, with slowed-down sequences highlighting the impact of critical strikes and the ominous presence of their abilities.

Throughout the fight, Machu, a younger pilot and observer, watches in awe and fear, recognizing the depth of Shiiko's obsession and the harsh realities of war that still haunt veterans like her. Shiiko's fixation on the Red Gundam reveals her inability to escape the trauma of her past, despite having built a family and attempted to settle into peace.

In the climax, Shuji manages to outmaneuver Shiiko, securing victory in the Clan Battle. However, the cost is high: Shiiko succumbs to the injuries sustained during the fight, dying as a result of her relentless pursuit of revenge. Her death underscores the tragic consequences of war and obsession.

The episode closes with the surviving characters reflecting on the battle's intensity and the human cost behind the mobile suit combat. Shuji and Amate Yuzuriha express their shared desire to eventually reach Earth, symbolizing hope and a future beyond the conflict. Meanwhile, Commander Challia Bull and Xavier Olivette continue to observe, gathering intelligence on the pilots and the evolving dynamics of the Clan Battles.

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

• Shiiko Sugai ("The Witch") dies from wounds sustained in the battle, her obsession with the Red Gundam leading to her tragic end.

• Shuji Ito (Red Gundam pilot) survives, victorious but marked by the intense and costly fight.

• Machu remains inspired yet shaken by the encounter, deepening her understanding of war and the pilots' burdens.

• Amate Yuzuriha continues alongside Shuji, sharing his aspirations.

• Commander Challia Bull and Xavier Olivette remain observers, their roles ongoing in the larger conflict.

This ending highlights themes of obsession, the lingering trauma of war, and the harsh realities behind the glamorous facade of mobile suit battles. It contrasts the youthful hope of characters like Shuji and Amate with the haunted past of veterans like Shiiko, setting a poignant tone for the series moving forward.

Mobile Suit Gundam GQuuuuuuX, Season 1, Episode 4 "The Witch's War" does not have any mention or indication of a post-credit scene in the available detailed reviews, recaps, or episode analyses. The sources focus extensively on the episode's main content, including the introduction of the character Shiiko Sugai (The Witch), her backstory, and the intense mobile suit battles, but none reference a post-credit scene or additional footage after the credits roll.

Therefore, based on the current information, there is no post-credit scene in episode 4 of Mobile Suit Gundam GQuuuuuuX.

Shiiko Sugai, known as The Witch, is a former Federation ace pilot and super unicum who appears in episode 4. She is motivated by a personal vendetta against the Red Gundam because it killed her Mav during the One Year War. Despite having settled down with a family, she remains obsessed with mobile suit combat and seeks revenge, driven by PTSD and the haunting memory of her lost comrade, who she likely had romantic feelings for.

The Witch's arrival intensifies the Clan Battle, presenting the first real challenge to Machu and Shuji, who have been on a winning streak. Her ruthless and highly skilled combat style pushes Shuji to use his supernatural gifts to gain the edge. Machu admires The Witch's determination but is shocked by the brutal reality of the fight. The battle highlights the increasing deadliness of mobile suit combat and raises the stakes for the protagonists.

Machu is portrayed as somewhat naive and idealistic, quickly attaching herself to both Shuji and The Witch because they represent something extraordinary compared to her plain life. She admires The Witch's intensity and determination, contrasting with her own mother, and idealizes Shuji, hoping to go to Earth with him someday. Machu's interactions reveal her longing for a more meaningful existence beyond the artificial space colony life.

Commander Challia Bull and Xavier Olivette, along with his Zeon crew, observe the Clan Battle closely to learn more about the pilots of the Red and White Gundams. Their presence adds a layer of strategic observation and interest in the unfolding battles, suggesting that the outcomes and pilots' skills have broader implications beyond the immediate fight.

Episode 4 features notably more violent and intense mobile suit combat, with animation that balances peaceful character moments and gritty battle scenes. The animators emphasize the deadliness of the mobile suits' attacks, using slowed-down sequences to highlight significant strikes. The pilots' Newtype abilities are portrayed as more ominous and impactful, marking a dramatic escalation in the series' mecha battles.

Mobile Suit Gundam GQuuuuuuX, Season 1, Episode 4 ("The Witch's War") is not fully family friendly due to its intense and mature content. The episode features heavy and violent mecha combat scenes with graphic depictions of battles that include destruction and death. There are emotionally intense moments involving characters who face personal loss and obsession, including a character who has abandoned her family for combat, which may be upsetting for children or sensitive viewers. The tone is darker and more serious compared to earlier episodes, with themes of conflict, sacrifice, and the harsh realities of war.

Potentially objectionable or upsetting aspects include: - Graphic and violent mobile suit battles with significant destruction and casualties. - Emotional scenes involving loss, abandonment, and obsession with revenge. - Mature themes related to war, personal sacrifice, and psychological strain on characters. - Some intense character confrontations and morally complex situations.

These elements suggest the episode is better suited for older teens and adults rather than young children or highly sensitive viewers.