Catalyst is voluntarily akumatizedvillain by Hawk Moth, a power-enhancing supervillain. She wears a blue helmet with a red visor, dark grayish cornflower blue edges and a red spike pointing towards the back of her head, blue dress suit with pointed shoulders, her pant legs came down to her feet, having red high-heels, soles, and tips. Catalyst has the power to multiply/enhance/augment/increase someone's powers, then they're new her/villain name starts with Scarlet, like Hawk Moth > Scarlet Moth.