Saintess Emilia - Girl Captivated by a Devil [Survive]

10 years ago, a child lost their parents to a devil attack on their village. The elf Emilia and the human Roy grew up while supporting each other like siblings. Their renown as devil fighters grow, and soon they received a high-profile request: to exterminate a devil residing inside a certain temple. They go about their work as usual, however, it wasn't the figure of a devil that greeted them when they arrived...