The first copy of Arlow Tsai appeared in the plane of existence that the original Arlow Tsai exists in. Just further away out the galactic arm than Planet Wroug or the Lan Space system.
That plane of existence has mirror zones with a neighboring plane of existence. Not all of the two galaxies is mirrored. It does not mirror most of Lan Space (they actively worked to separate life paths).
Ami of Wroug was the point of intersection for the first appearance.
Her mirror counterpart, Ima, will be the second point of intersection.
The situation with Ima is worth repeating.
Ima stood-in for a visiting Lan that had been kidnapped.
Ima was eventually rescued by an elLan that was 'bonded' to Ami (legally and by soul energy connection).
Ima lost their male Wroug body to poison.
The elLan was able to implant the soul-spirit of Ima into a prototype mechanical host (created by the kidnapper).
The Lan of that mirror plane of existence collected Ima for questioning.