In his youth, Atsukau and his people lived on their homeworld, indulging in all kinds of frivolities through their power over creatures with weaker psi abilities – which meant basically all of them. However, at some point, Yiarhu-Kah and nine other of his kind of ultimate killers were sent by the Super-Directors to destroy them. Losing only four of their own, they eradicated the entire population except for a few Sillage collaborators, which included Enshu. 
Nävis first encountered Enshu aboard the Committee ship after the leaders of Wake had been briefed on her status and offered her a job as a cover agent. He told had that he had long desired to meet her, and invited her to his residence.