In case you wonder why was Arlion screaming when a "simple" sword stab is far from the worst wound he had received during this fight, then don't forget what was said sword made of, in other words demonite.
Which is an imaginary metal in which Aisha packed the aspects of mithril, orichalcum, devil sea ore, antinite and Disaster's metal.
And right now, Aisha was using four of those aspects through the sword, to give Arlion quite an interesting experience, first and formal, like Aisha had said Arlion's lineage wasn't of negative orientation directly, but that was earlier when he hadn't fully released the curse.
