Aisha is the reincarnation of Abella and the priest is the reincarnation of Abella's lover. I believe the priest doesn't want Aisha to use her light power, idk why but aren't they pretty toxic?? So now since Hades is interfering, the priest felt threatened now.
Every tears we shed, every swears we spat, every anger we felt, every time we waited and waited, day and night, it's worth it.