Nico Kanna

Nico is a mostly quiet girl, being constantly seen with the same uninterested look on her face (which barely changes even when pierced with an arrow). However, she possesses high intelligence; arguably the highest in the bunch. She is a tech expert, and uses several pieces of high tech equipment, such as smartphones, to assist the girls with information. She is also able to quickly analyze situations, and notice subtle details that the others do not. Her smartphone uses an app created by the Pleiades Saints that can pick up the residual power of witches. She can be sarcastic at times, but with no malice. While she appears taciturn, she also harbors a great deal of guilt beneath the surface, as when she was very young she accidentally shot and killed her 2 friends. Her name was previously Kanna Hijiri [聖カンナ]. Her wish was to create another version of herself, with a happy life and no memory of a traumatic incident in her past. She gave this name to her duplicate upon making her wish. (Source: wikia)