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youkai (zenless zone zero)
Youkai is a major antagonist in Zenless Zone Zero. It is an extremely sophisticated, highly intelligent artificial intelligence and one of the Four Keys originating from outside New Eridu, serving as a direct counterpart and enemy to Fairy (alongside Jinni and Ghost).
In game, they are depicted as a red eye. A fanmade personification was featured in a music video shown in the 2026 Zenless-focused HoYoFair video "The Random Play 2nd Anniversary" made by Jin, or Shizen no Teki-P, creator of Kagerou Project, gaining traction among artists.
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