Hiead Gner, designated candidate number 87, is an orphan forged by hardship in war-torn colonies before entering the Goddess Operation Academy. These experiences forged deep resentment toward those born into privilege, resulting in a cold, emotionally detached personality defined by pervasive distrust, particularly directed at fellow candidate Zero Enna. This animosity arises from their shared status as rare candidates possessing dual EX abilities, positioning them as natural rivals within the academy's competitive structure.

Hiead exhibits exceptional piloting aptitude and combat skills, surpassing many peers. His approach to training and missions is marked by ruthless pragmatism and intense focus. Interactions with his assigned repairer, the shy Ikhny Allecto, reveal his harsh demeanor; he explicitly states "your job is to support me," emphasizing a strictly transactional approach to their partnership. This dynamic occasionally borders on threatening, reflecting his general disregard for interpersonal connections.

Within the narrative, Hiead serves as the antagonistic rival to protagonist Zero Enna. Their relationship is defined by persistent friction and confrontational encounters. While subtle indications suggest a potential softening of his hostility toward the series' conclusion, the unresolved story prevents definitive confirmation. The manga portrays Hiead with greater viciousness than the anime, depicting him as a blood knight willing to inflict severe harm on classmates during training and highlighting more violent clashes with Zero, devoid of reconciliation attempts.

Hiead's signature white hair visually contrasts with his morally ambiguous and often callous actions. His character arc, like the overall narrative, remains incomplete due to the series' unresolved status across all media, leaving core aspects of his background, motivations, and potential growth underexplored.