The Seko (セコ) are kappa yōkai children.
Appearance
Personality
History
Fifth Anime
They appear in GeGeGe no Kitarō: Nippon Bakuretsu!!. Five Seko are a part of the chosen 47 Yōkai Warriors and they represent Ōita Prefecture.
Due to the fifth anime adaptation's sudden cancellation at 100 episodes, they are among the 23 Yōkai Warriors that were not revealed aside from the movie.