Height: 185 cm (6'1") Weight: 76 kg (168 lbs.) Eye color: Blue Hometown: Mousanish District Zack is a genius with an IQ of 200 whose field of expertise is space science. He even has a spaceship pilot's license. He and Quitterie have been friends since they were little due to their parents being coworkers.

Spoiler

He ends up marrying Quitterie.