Tiana is a Demonis Black Trister that serves as a subordinate of Salahar. She has no Mechtogan, although her Mechtogan Titan is the black Demonis Razen Titan. She is also the lover of Salahar, and the mother of the child known as Thorn.
Tiana suffers from a multi-personality disorder, which can cause her to go from the persona of a young girl with tons of energy to a psychopathic madwoman who will stop at nothing to destroy the opposition. Although this may be bad in her personal life, it often gives her and her teammates the upper hand in battle.
After having Thorn, her moods evened out for an unknown reason. She is still a General, but she cares deeply for her daughter, and almost always refuses to have Thorn on the front lines for any reason.