Glenda guards a relic from the Cleansing hidden at Lake Kannawa, a vessel storing vital knowledge about Cain, a pivotal figure in the series’ mythology. Tasked with shielding both the artifact and its secrets, she anchors key events tied to Itogami Island and confronts threats such as the Holy Ground Treaty’s military incursions.

Her youthful appearance—long, pale hair and bright eyes—belies the gravity of her duties. Though she exudes a playful, childlike demeanor, frequently punctuating speech with the exuberant interjection “Da,” she harbors fierce protective instincts, especially toward Yuiri Haba of the Lion King Organization.

Glenda wields the ability to morph into a colossal dragon when fear or the urge to defend others overwhelms her. This transformative power proves decisive in clashes, from safeguarding Yuiri to thwarting large-scale assaults. During the Holy Ground Treaty’s siege of Itogami Island, she activates “Cain’s Legacy” from the relic’s node, a tactical maneuver crucial to repelling invaders.

Factions like the Knights of the Sinful God pursue her at Lake Kannawa, aiming to exploit her bond with the relic. Her alliances with figures such as Yuiri and Nagisa Akatsuki weave her into rituals meant to contain ancient dangers, though these efforts sometimes trigger unforeseen repercussions.

As a living archive of Cain’s history, Glenda remains a passive yet indispensable force in unraveling primordial conflicts and the enduring influence of mythic legacies. While her narrative arc centers on guardianship, her transformative acts and strategic interventions cement her dual role as both defender and narrative keystone.