Annette, a petite figure at 144 cm with grayish-pink hair and a left-eye patch, balances childlike impulsiveness with clinical pragmatism. She refers to herself with the audacious pronoun "ore-sama," her mischievous grin often preceding pranks or explosions. Traces of trauma-induced amnesia linger—no memories exist before age ten, her moral compass stunted by a void where fear should reside. Abandoned as an infant in a train station’s trash, she was claimed by Matilda, a guardian who twisted care into cruelty. Physical blows and psychological games erased Annette’s earliest self, and a second abandonment left her adrift until a spy agency harnessed her uncanny technical prowess, inherited from Matilda’s own skill.

Her mind captures blueprints like a camera lens, reconstructing advanced machinery with eerie precision. Bombs and traps crafted by her hands outpace her world’s brightest minds, earning the codename "Oblivion" and a reputation as her team’s "final weapon"—a title reflecting her frosty efficiency. Yet beneath the calculated exterior simmers chaos: she rigs teammate Lily’s room with explosives, taunts Erna with grin-edged schemes, and deflects camaraderie with icy detachment. Thea, the mind-reader, finds only hollow echoes in Annette’s thoughts, save for a relentless fixation: stretching her 144 cm frame.

This obsession manifests in upside-down hammock sleeping and bristling defiance against direct orders. When Matilda resurfaces, manipulating Thea’s compassion, Annette’s response is surgical vengeance—a ruthless strike belying her usual capriciousness. Her inventions remain vital to missions, threading a paradox between destructive whims and indispensable genius, a shadowed enigma clinging to both rebellion and purpose.