The last male member of the Gilgamesh to be seen. Decem's Dynamis seems to be able to manifest itself in the power of Water; he is a strong Dynamis user, but there is little else known about him. He can be recognized by his ponytailed blue hair. Decem is more calm then Tria in meeting but seems to like Tria over Novem.

After an explosion at an archaeological excavation research facility in the Middle East, the world is changed in unthinkable ways. The sky is suddenly a mirror, electronic devices mysteriously no longer work properly, and children who are born after this point seem to have strange, metaphysical powers. Society is but a shell of its former self, and in the midst of the clandestine forces that brought about this eerie apocalypse is an elite group of young, powerful mutants who are working to restore the world under the direction of a woman known only as The Countess.<br><br>
The story centers on a brother and sister, Tatsuya and Kiyoko, the children of a scientist at the Twin X facility.<br><br>
(Sources: Blockbuster &amp; ANN)


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Son of voice actor [Akio Nojima](https://anilist.co/staff/95918). 
Elder brother of voice actor [Kenji Nojima](https://anilist.co/staff/95074).

David Anthony Matranga is an American voice actor from Houston, Texas. He works primarily for English dubbed anime for Funimation and Sentai Filmworks.