From the native perspective, they were incredible assets for bypassing security, mostly. They weren't particularly trusted, but they were relied on.

When they withdrew, more or less during the mission that assassinated Malion, they were assumed to be martyred in the battle that surrounded that. The plan had been that they would have helped a team of rebels steal and place a Hellstone and escape. Without their help, there was a bloodbath, and a protracted battle in the upper Spire of some city - not Fallenheart or Fallen Wrath - and the Hellstone was not recovered by any side, its whereabouts unknown.

There was an extremely acrimonious dispute post-Jaunt about whether a Traveler had made the Hellstone go missing and what they had done with it that was, to the best of her knowledge, never resolved.