She is the arch enemy of Asagi, leader of the ONT, subordinates to Edwin Black, executive of Nomad and master of the first Chaos Arena. "Oboro" is the revived body of the Taimanin, Koukawa Oboro that had been demonized and is missing the original soul. After TA1, she has been revived once more, as a vampire. Oboro has violet short hair with a bob head cut. She has medium breasts. She has red lips and violet/purple eyes.

She wears a red battle suit with a V cut. 