Irlav Jarol is an Imperial residing in the Arcane University, where he serves on the Council of Mages as a Master Wizard. He is a researcher specializing in Ayleid history. He authored the book Magic from the Sky.
Irlav sends the Hero to Vahtacen, to assist Skaleel with the research of an Ayleid pillar, that's affected by Destruction magic. After uncovering the Bloodworm Helm in the halls below it, the Hero brings the helm back to Irlav for study.
After Mannimarco addresses his presence in Cyrodiil, Irlav takes the Bloodworm Helm to Fort Teleman with a group of mages to study it, hoping to find a way to counter Mannimarco. Arch-Mage Hannibal Traven sends the Hero to Fort Teleman to ensure that Irlav returns the Bloodworm Helm to the Arcane University. Investigating the fort, the Hero finds Irlav dead and the Fort filled with Necromancers.