The Vritra Unit (ヴリトラ・ユニット Vuritora Yunitto?) is another ISDA unit tasked with destroying Thanatos. Itsuki Habaragi is the unit leader. They are stationed in the L-3 space station orbiting Earth.

When the fourth original dragon from Thanatos appears, the Vritra Unit, except for Itsuki and Otohime, is annihilated during the confrontation.

In early Vedic religion, 'Vritra' was an Asura with the aspect of a serpent or dragon.

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