Flandre Scarlet is Remilia Scarlet's younger sister, a dangerously powerful vampire who appears as a young girl with pale skin, red eyes, and short blonde hair in a side ponytail. Confined in the Scarlet Devil Mansion basement for centuries due to her overwhelming destructive power, she oscillates between innocent childlike glee and terrifying intensity. Genuinely curious about the world, she craves interaction but struggles with social norms and control. She speaks simply with enthusiastic excitement that can turn ominous. Known as the strongest, with ability to destroy anything by finding its 'eye'[1][2]