Janssen served on a communications team that participated in explorations of the galaxy. The Jedi Sturm Umbrik came across the moon known as Shara'Tam and subsequently reached out to Janssen through a holorecording, communicating the expedition's discoveries. Umbrik expressed his awe of Shara'Tam and urged Janssen to dispatch a team without delay. Many centuries passed, and during the era of the Galactic Republic, Servit, a Mirialan who was related to a member of Umbrik's crewmembers, unearthed a droid. This droid's memory banks held the message referencing Janssen, which he played after managing to restart the droid.
Janssen's name appeared in "Galactic Tales: Inheritance," a short story from the Galactic Tales collection. George Mann penned the story, which saw publication in the 211th issue of the Star Wars Insider magazine on June 7, 2022.