Annette is a petite spy with grayish-pink hair and an eyepatch, officially recorded as 14 years old though her true age and origins are unknown. Abandoned as an infant in a train station trash can, she was taken in by a woman named Matilda, who subjected her to abuse, forced plastic surgery that crushed one eye, and inflicted severe amnesia erasing all memories from before her spy training. Despite a childlike appearance and a mischievous grin, Annette operates without conventional morals or fear, driven by fleeting curiosity and unpredictable whims. Her emotional core is profoundly empty, with a relentless fixation on growing taller. She possesses extraordinary engineering prowess, excelling at crafting gadgets, bombs, and traps that surpass her nation’s technology, earning her the codename Oblivion or Forgetter and status as her team’s final weapon. She often uses her talents for pranks, such as rigging explosives in her team’s mansion. Her relationships are complex: she forms an unconventional maternal bond with teammate Thea, affectionately calls her leader Klaus big bro while targeting him with traps, frequently pranks Erna, and manipulates Sara’s feelings. When Matilda resurfaces and endangers the team, Annette kills her by trapping her in a container with a sabotaged toolbox concealing a bomb. Beneath her calculated exterior simmers chaos, yet she shows nascent loyalty and dependence on Thea, hinting at incremental emotional growth.