Erich had spent hours conveying to Daelia that which he had already told Lunaria years ago. He had even provided the evidence that Mirage and her secret agency had gathered. The fact of the matter was that with Tia's help, extra galactic travel was entirely possible.
Meaning that the GSE had been busy these last few years sending recon probes into Andromeda. They had, in this time, learned a lot about the whereabouts of the Naraku. In fact, the Naraku behaved vastly differently in Andromeda than they did in the Milky Way so far.
In the Milky Way, the Naraku were a nomadic insectoid race, once that devoured all biological life they came across, stripping entire worlds bare in the process. And while this seemed to be the case in Andromeda, something else was observed that the recon probes recorded.