Mana Takamiya is Shido's biological little sister. She is a temporary Second Lieutenant of the AST, and she used to work for the DEM Industries base in England as a Wizard. Mana appears to be around the age of a middle-school girl. She has long blue hair, tied up in a ponytail, with some bangs left out. She has brown eyes and a mole under her left eye. She resembles Shido a lot, particularly while he is crossdressing as "Shiori". Her casual outfits tend to lean toward boyish clothes such as hoodies and tank tops. Her school uniform 30 years ago was a black sailor outfit. She would later wear a white uniform like Kotori when she joined the same middle school, and then the Raizen female uniform. When she is at the JGSDF base, she wears a military uniform. Due to her young age, however, it gives others the impression that she's cosplaying. During combat, she wears a light blue CR-Unit. After joining Ratatoskr, she wears a black and blue CR-Unit vaguely resembling a wolf's fangs and claws. Her three sizes are B74/W56/H80. Mana is a girl with different sides to her personality, depending on the situation at hand. On one hand, she can be a cold-hearted killing machine; a trained soldier. On the other hand, she shows herself as a young lady who cares for her brother, Shido, very deeply, and will place her family as her number one priority over any order she may receive. According to Kotori, she is very similar to Shido in regards to displaying reckless behavior when wanting to help others. She appears also to be a tomboy, having a passion for sparring activities like kendo and a preference for sporty outfits.