The, conversely, why did she have to kill Lennah?
I think the simple fact that he knew something about the SnK would do it. But he might still have been useful to Adelmo.
Although...What if we go back to the first reason Kuylen and Adelmo used Lennah in the first place. It was money. Lennah is rich, and I would assume that to undertake all of this hopping around the galaxy, stealing artifacts and whatnot would require a decent amount of money.
Could we check to see if Lennah's auto-program is routing funds anywhere?
Well Adelmo, so far, used Katai to do her dirty work. So it's not a stretch to think Adelmo sent Katai to 'deal with' Lennah.
Thing is, what did Lennah know that Adelmo didn't want people to find out about. Was it something to do with Adelmo, the scrolls or the SNK itself?
Would she really go this far just to cover up her existence?
I know we've already established that Katai/Adelmo probably did this to Lennah, but in response to Ush's referencing those who experienced Kuylen:
He would not have really messed around with the technical stuff like this, even if he had people to do it (which he did). Kuylen would have given Lennah a clean death and then dealt with anyone that came after him for it. Kuylen is/was the honorable soldier type due to his background and training.
Unless I missed something here, or something from earlier, but it was Eliza that had logged in prior to the automated program having been activated. Even if she was forced to do it, it may be that she logged in and did it under threat, and the same threat of (possibly) death may be what is preventing her from telling us what the truth is.
If not then they hacked in, and we've got nothing.
Denzral leans away from the console, and takes in the room. "I don't think there is anything here, all we've recovered leads us back to Eliza." He will take a deep breath.