Executor Irma Astrodius is a high-ranking battlemage of House Astrodius. She often patrols outside the walls of Javervale in the surrounding fields. She rescued an unconscious Mesper Sorgowin from an undead giant, but seemed bristled by the primal magic of Zinlynndise Imarewhen she tried to retrieve him.
Though the exact details of her magic are unknown, Irma commands powerful lightning magic and a similar gift of divination to her twin brother, Ingo Astrodius. Together, they enact the designs of the Overseer of Javervale.
One day, Irma and Wulf Astrodius arrived at First Landing. They wanted to hire a group to search for Ingo Astrodius, who had gone missing. When Ingo was safely returned after the events of Blood Ties, she rewarded the party handsomely.
Soon after, in Underworld: Rebellion, Irma approved Toma's request to investigate the Vampires infesting Javervale and even formally hired the party for their eradication. The day after the party's arrival, Javervale became the site of an attempted coup: the Vampires and rebels, aided by the party, tried to takeover the city by assassinating the Astrodius siblings. Irma fought valiantly, defeating and killing more enemies than every other soldier combined. She was furious at the party's betrayal but was reasonable enough to cooperate with them when they agreed to help destroy the Vampires once and for all. After the Vampires were destroyed, she decided to overlook the party's betrayal and paid them for their service as originally promised.