Salai? That's Michelangelo's assistent! Michaelangelo the Immortal Elf from the similarily much maligned Black Madonna novel, that is, also known under his net nickname Brightlight. Of course said Elf was later retconned to be just a fanbody of the real Michelangelo, taking on his name, and not the historical real deal - but in any case, Salai did escape Lofwyr's murder of Brightlight, didn't he? So it must be him! And he's an otaku techwiz who has learned from who was the most tech-savvy IE, so he should be able to cut through net security well enough. And of course, given what happened to his mentor he would have a motivation to hide.
So, yeah, that's Salai. But what has he to do with Atztech?