The male Endministrator from Arknights: Endfield is the enigmatic main protagonist, legendary guardian of the planet Talos-II, and the foundational leader of Endfield Industries. Known colloquially as "Endmin" or by the alias "Darkmask," he is a revered figure who historically emerged from periodic hibernation to single-handedly turn the tide of catastrophic global disasters, though his true identity remains tightly classified. Physically, he appears as a medium-tall humanoid teenager or young adult—estimated to possess a physical age around 25 but a chronological age spanning over 152 years due to extended stasis. He features a relatively realistic human 7.3-head body ratio, which theorycrafters estimate places his height around average for a young adult male model. Unlike the animalistic "Ancient" races native to the setting, he lacks any animal features, leading to widespread consensus that he originates from an ancient precursor human lineage. He has pale skin, sharp facial features, and short, messy black hair with light, distinct tuffs styling his silhouette. When unmasked, he reveals deep, piercing blue or gray eyes, though his typical public presentation includes a signature sleek black visor mask that covers his eyes completely and subtly displays the "Endfield Industries" lettering. His combat outfit seamlessly blends advanced futuristic aesthetics with functional, high-collared tactical survival gear. He wears a crisp white undershirt beneath a structured black tactical vest, paired with a distinct gray coat or long jacket featuring bold, glowing yellow highlights and lining. This specific visual palette—a long dark coat over a white front with yellow accents—has famously led the gaming community to humorously compare his silhouette to an emperor penguin, giving rise to the viral "Penguinistrator" meme. His lower uniform consists of fitted black tactical pants, heavy-duty black combat shoes, and utility straps designed for agility and high-mobility skirmishes. Backstory-wise, the male Endministrator is an ancient pioneer who was instrumental during the initial colonization eras of Talos-II. Over the centuries, he entered an Originium hibernation cocoon or cryostasis pod, awakening only during existential crises. Ten years prior to the current timeline, he successfully saved Endfield Supervisor Perlica during a brutal war. However, following a critical accident and a subsequent decade-long slumber, he is abruptly ejected from his glowing cocoon into the modern era, suffering from severe amnesia caused by temporal lobe injuries. While his memory of past promises is entirely wiped, his high-level linguistic, technical, and strategic cognitive functions remain completely intact. Personality-wise, the Endministrator is a selfless, strong-willed, and natural-born leader who commands deep respect without resorting to fear. Despite his profound memory loss, he demonstrates a protective instinct toward his allies, actively ensuring that everyone returns from dangerous missions alive and offering reassuring words to boost morale when his team is dispirited. He is fundamentally an enigmatic, quiet leader who excels at maintaining highly guarded technical secrets. However, his immense sense of duty carries a stubborn, self-sacrificing streak; he is known to push his unique, earth-shaping Geokinetic Originium Arts far past their safe limitations to seal enemies or construct vital protocol infrastructure, often at direct personal risk to his own physical stability.

Yvonne is a brilliant, rebellious Vouivre scientist in Endfield Industries who defies typical nerd tropes with her chic, flamboyant pink hair, eyes, painted horns, and custom futuristic outfit; despite skipping academic conferences for fashion magazines, this eccentric genius independently leads advanced technological research on the mysterious Æther and Blight.

Perlica is a calm Liberi supervisor in a gray dress and off-shoulder jacket who led Endfield after a childhood rescue.

Chen Qianyu, a joyful Lung swordswoman with blue horns/tail, fights optimally in tactical gear.