The Deathless Black Snake
One of the "Ageless"—immortals who've watched Terra change across centuries—the Deathless Black Snake has seen empires rise and fall, conflicts play out, and the world's true nature revealed. Their longevity likely stems from a disturbing ability: they can implant fragments of their consciousness into other people, subtly warping their thoughts and beliefs over time until victims align with the Snake's ideals.
Within the Arknights story, the Deathless Black Snake operates through at least two known bodies: Kashchey and Koshelna. What their original form actually is remains unclear, though fans and the narrative alike hint at something serpentine—fitting given the name. Whether that true body still exists or where it might be hidden is left deliberately vague.
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