Rachel initially appears as a fragile girl Bam protects, but her shocking betrayal of him to secure her own path into the Tower reveals a ruthless ambition hidden beneath her perceived weakness.
Bondrewd's chilling politeness and calm demeanor mask his horrific experiments in Made In Abyss, framing even the torture of children as scientific devotion.
Bertholdt Hoover's anxious and meek persona in Attack on Titan cleverly disguised his true identity as the devastating Colossal Titan, shocking everyone when Trost District fell.
Utsuro masterfully hid his immortal, apocalyptic nature for hundreds of Gintama episodes, masquerading as the beloved teacher Shoyo Yoshida before his true, terrifying identity was revealed.
Trapped within a mirror, Miranjo used her seemingly helpless state to manipulate the entire kingdom of Bosse for decades, orchestrating wars and assassinations with cunning patience.
Roberto's unassuming, overweight appearance in Monster cleverly hid his true nature as one of Johan Liebert's most efficient and nearly unkillable assassins, surprising Dr. Tenma.
Zouken Matou's frail, senile facade in Fate/Stay Night concealed a centuries-old body sustained by crest worms, allowing him to orchestrate horrific abuse under the guise of weakness.
Yoshikage Kira in JoJo's Bizarre Adventure used his mundane salaryman life as perfect camouflage, his obsessive normalcy hiding a serial killer's habits and a powerful Stand.
Kyubey's adorable, plush mascot design in Puella Magi Madoka Magica expertly conceals a cold, cosmic entity, tricking girls into devastating contracts with hidden costs.
Meruem initially underestimated human strategy in Hunter x Hunter, but quickly evolved from a naive newborn into an unkillable Chimera Ant king, a formidable threat.