Mio Tsukushi

In addition to the normal position displacement (disappearing in one position followed by reappearing in another) much like Aoi, the young teleporter Mio can also generate distance-displacement portals that can even ignore physical obstacles.

Outside of combat, Mio comically has slow responses to things which should be obvious, such as what happens to people in an airtight room which is removed of air. Mio is unwilling to accept Kaoru as any kind of ruler that could replace her beloved Hyoubu and sees her as more of a rival. After Mio, as well as a couple other P.A.N.D.R.A. members, transferred into The Children's class she eventually develops a warm friendship with Kaoru, even if she hides it behind a tsundere facade.

(Source: partially wikipedia)