(@NOSTD1VISION)
At first, he really only saw Navi as another one of his bosses.
But he grew to like her, although he's too shy to straight up admit it.
He occasionally messes up a task on purpose or interacts with consoles he's not supposed to, simply to hear her voice again.
Sheโd have a moment of warning as Z-534โs spotlight - like eyes shine up the moonpool, warning to step back if sheโd like, or any other of that such.
( said sonar had been activated by NAVI. She was waiting patiently, arms crossed behind her back, standing pretty close to the edge of the moonpool . )
As Z-534 is generally given some degree of freedom, the moon-pool leading out to the general Let-Vand zone is open โ
Which is the purpose of the observation room in Itโs cell having a system to send out sonar and call her.