Jericho, a human knight born into a revered lineage of holy knights, navigates a tumultuous path between antagonist and protagonist across multiple conflicts. Forced to masquerade as a man to circumvent her brother Gustaf’s disdain for her ambitions, she cultivated a brash, recognition-driven persona while guarding Baste Dungeon, masking deep-seated insecurities. Gustaf’s death catalyzed her transformation: she honed her ice-based "Icefang" techniques and swordsmanship, abandoned corruption, and aided Liones’ reconstruction, pivotal in stabilizing allies like Ban and Elaine and recruiting Escanor against threats like Galand.

Her resolve was tested defending Liones from the Supreme Deity’s assaults in *Cursed by Light* and mentoring Lancelot in *Grudge of Edinburg*, where her training shaped his heroism—yet their bond frayed as she grappled with taboo romantic feelings. Despite moments of recklessness, flirtation with Ban, and self-serving choices, her loyalty to Liones seemed steadfast—until *Four Knights of the Apocalypse* revealed her betrayal to Arthur’s Chaos Knights, driven by a recurring hunger for validation. Even then, she spared former allies like Lancelot and Guila, hinting at lingering allegiance.

The consumption of demon blood intensified her confidence and moral decay, juxtaposing her knightly ideals against corrosive power. Her narrative weaves redemption and relapse, a cycle of confronting societal constraints, familial scars, and the lure of dominance—a knight eternally torn between legacy and shadows.