Chohoki Teki Kaeru / Cho
https://gcnovels.jp/special/gcnb/majotoyouhei/
[Machine Translation] After killing each other, the Witch of Mischief and a mercenary with a long history of warfare end up working together. The witch wishes to go to a place where her life is not threatened. However, there is no place on this continent where the witch, a symbol of fear, can live peacefully. Thus, the two head for an unknown continent where no one knows anything about them. But there, they find a different world full of lost magic and vicious magical beasts.