left to write – if “ba’al nefesh” means someone with a soul, a person who is not a “ba’al nefesh” is a soul less creature. That is simple tagrum.
That soul less creature may be a ba’al guf, or a ba’al ta’aveh or a MO but certainly not a “ba’al nefesh”.
I would not wish on them the expression “may G-d have mercy on their souls” since it would be a bracha l’vatalah.