1. Taylor Travis [Alive] Appearance: A young man in his late teens. He carefully wears his former PPDC trainee uniform jacket. Personality: Serious with a strong sense of responsibility. Protecting his sister Hayley is his top priority, though he can be overly cautious, leading to friction. Background: The protagonist. As a former Jaeger pilot trainee, he possesses knowledge of piloting and tactics. He operates the Atlas Destroyer with his sister on a journey to find their parents.

2. Hayley Travis [Alive] Appearance: Taylor's younger sister. Wears active, easy-to-move clothing. Personality: Energetic with a strong sense of justice and deep compassion. Unlike her brother, she is the type to act on intuition. Background: The other protagonist. In the isolated Australian settlement of Shadow Basin, she accidentally activates a long-abandoned Jaeger (Atlas). This event marks the beginning of the story.

Boy [Alive] Appearance: A mysterious boy who wears no clothes and does not speak. Personality: Innocent and attached to Hayley and the others, but possesses the raw strength of a wild instinct. Background: Rescued from a PPDC experimental facility during their journey. His true identity is a Kaiju-Humanoid created by the Precursors (aliens who create Kaiju). He transforms into a giant Kaiju when in danger. Everyone refers to him as Boy.

Mei [Alive] Appearance: A girl with short hair and a cool demeanor. She has a tattoo on her neck and possesses extremely high combat abilities. Personality: Appears solitary and cold-blooded, but is actually caring toward her comrades. Her past memories have been erased. Background: Picked up by the unscrupulous merchant Shane and raised as his assassin. She initially encounters Taylor and the others as an enemy, but eventually betrays Shane to discover her true past, becoming a reliable partner and pilot for Atlas.

Branden Travis [Status Unknown / Later confirmed Alive] Appearance: Taylor and Hayley's father. A reliable veteran pilot. Personality: Brave with a deep love for his family. Background: Five years ago, when the Australian continent was overrun by Kaiju, he hid his children in a shelter and set off for Sydney with his wife in the Jaeger Hunter Vertigo to seek help.

8. Brin Travis [Status Unknown / Later confirmed Alive] Appearance: Taylor and Hayley's mother. A woman who combines strength and kindness. Personality: A pilot who fights with strong determination alongside her husband Branden. Background: She paired with her husband in a Drift to head for Sydney. For the children, finding these parents is the primary goal of their journey.

Appearance: A glowing blue sphere floating inside the cockpit. Despite the mechanical visual, the emotion simulation function gives Loa a very human personality. Fundamentally a rational and cold realist. However, internally, Loa harbors deep trauma from witnessing the total annihilation of past pilots. Initially shows a coldness that pushes away inexperienced pilots, but hides a deep capacity for affection, forming family-like bonds through life-and-death struggles. Speech style is based on calm, polite language, but is characterized by frequent sharp-tongued remarks, sarcasm, and exasperated sighs.

Shane is the ruthless ruler of the mobile community Bogan. Appearance: A suspicious-looking middle-aged man of the wasteland with a graying beard, but in essence, he is a cold-blooded realist who profits from trading scrapped weapons. Personality: Extremely cruel. To raise Mei as a soldier, he erased and manipulated her childhood memories. However, in his final moments, he leaves the real memory data for Mei, making him a villain who possesses a twisted parental affection alongside his ruthlessness.

Appearance: A humanoid hybrid Kaiju with black armor, red glowing lines, sharp claws, and back spines, created when a Drone Jaeger from five years ago became biological. Personality and Traits: Ferocious, attacking and preying on humans and Kaiju indiscriminately. Being a fusion of machine and biology, it cannot speak, but it possesses high intelligence and can share memories by Drifting with others. Status: An individual that survived the previous drone rebellion and underwent self-evolution. It occupies a unique position as an independent third force (solitary predator) not under the control of the Precursor invaders. In this story, it only opens its heart to Boy and fought fiercely against the cult as an ally to the protagonists.

The Sisters of the Kaiju are an eerie female cult group whose skin has turned pale blue from Kaiju blood, and who wear black robes like nuns. Comprising about a dozen members, they primarily brainwash lonely, homeless women wandering the devastated world or those who are mentally pushed to the brink, drawing them in with sweet words about Kaiju being the salvation that will purge humanity's sins. All members are cold-blooded and fanatical, willing to sacrifice their own lives for the Kaiju. Ruling at the top of the organization is a masked old woman known as the High Priestess. She governs the legion as an absolute dictator, utilizing eerie psychic abilities to control the brains of others and magic-like techniques to command small Kaiju. Standing in an evil position as Kaiju fanatics—a stark contrast to the sci-fi military worldview of the film version—they torment the protagonists until the very end.