Nernil was the procurer for the city's Royal Necromancer, and was often found running dark errands in the city.
I'm Nernil, I am a procurer for Abisma, the Royal necromancer. He wans to talk to those skeletons on board the Hungry Jetsam...
Abisma needs a bit of Captain Kriker's clothing to be able to contact his corpse. I've got to get my hands on this grisly bit of fabric...
Captain Kriker wants to be brought back to life. In exchange, Abisma asked where Kriker kept the Ancient Scroll of Necromancy which he'd plundered on one of his raids...
Abisma will be very pleased. More knowledgeable about necromancy and very pleased. And Captain Kriker lives another day...
As Nernil only appears in Katya's tale, it is unclear if he ever really existed.