World King, Mondaiji tachi ga Isekai Kara Kuru Sō Desu yo? Wiki

Kurma (World King or World Dragon) She is part of "Avatara". She made herself look young in order to participate in the "Second Sun Authority War". She calls herself "Kuu-Chan" in her human form and urges others to call her the same. First Debut is in the Last Embryo Volume 2

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