She changes planets every seven days in a pattern: M'henga, Tarkus and Myrellion.
If Tarkus and/or Myrellion are destroyed, she will never appear on those planets.
She will always loop back to the next available planet in the same pattern.
Between 8:00 - 16:59, she will be wandering the hostile spaces.
Between 17:00 - 19:59, she will set up her booth in the safe areas.
If the following text is seen at her would-be booth location, she's on that planet: "Service and Checkup Hours: 17:00-20:00! 50 credits per condition!"
Between 20:00 - 23:59, she will be at the bar.