Yaimao joins Hikora in the Otokoyo game, united by the core goal of finding Hikora's missing sister, Sorincha, who vanished during an earlier iteration of the game. He acts protectively, often moving defensively in front of Hikora when dangers emerge as they navigate the abandoned, demon-haunted city.

He voices a clear motivation: uncovering what happened to *all* the children lost in past games. This wider investigative purpose complements Hikora's intensely personal search for Sorincha. Throughout their ordeal, Yaimao focuses on surviving the game's threats while steadfastly aiding Hikora in their shared mission. His actions consistently show loyalty to his companion and a resolute drive to solve the mystery of the disappearances.