The Executioner and Her Way of Life Vol 1

The Executioner and Her Way of Life by Mato Sato. A Fantasy manga rated Older Teen, published in English by Yen Press.

People from Japan are sometimes summoned to this fantasy world, where their powers can bring catastrophe. Menou is an executioner whose job is to quietly eliminate them, but her newest target, a cheerful girl named Akari, turns out to be impossible to kill.