Eponine quickly takes aim and shoots at one of the things loping towards you. The clearly twisted & deformed man is an easy target charging head-on and she tags him with an arrow in the chest for 4 damage putting him down.
The other hurtles forward recklessly and is countered by Ellie's carnivorous-looking eidolon. The eidolon pounces on the man jaws crunching for 8 damage leaving the man a broken wreck.
The skirmish over, you can more closely observe that these two beings certainly look like feral humans upon which some sort of twisted mutation has occurred... dangerously clawed hands, features twisting into a more bestial appearance. The ragged remains of clothing hangs off them randomly as if they have no thought for their own appearance or welfare.
Spoiler: Artaith heal check
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Heal check (1d20+7)[22]
Artaith doesn't recall any natural disease or condition that might cause such a change.