Tatewaki Chihaya

Magia: Light Trance (short for light transcendence), an ability that allows the user to move at incredible speed in a straight line, though when used excessively it can cause physical debilitation to various degrees.

Chihaya is Sumika's best friend and a master of iai-style kenjutsu. She frequently acts as Sumika's protector, and it is easy to mistake her for being excessively straight-laced. However, anyone that gets to know her will realize this isn't really the case.