E.G. Daily provided the original English voice of Buttercup in The Powerpuff Girls.
Daily voiced Buttercup throughout the original animated television series, giving the character a notably tough and energetic vocal style. Buttercup is the green-themed member of the trio and is commonly presented as the most physically forceful and quick-tempered sister. Her personality creates a strong contrast with Bubbles’ sweetness and Blossom’s more formal leadership.
The original voice cast helped make the three sisters immediately distinct. Cathy Cavadini voiced Blossom, while Tara Strong voiced Bubbles. E.G. Daily’s performance as Buttercup became especially recognizable because the character often delivers blunt remarks, challenges villains directly, and prefers action over careful planning.
Daily is also known for voice work in other animated productions and for live-action acting and music. Voice credits can vary between different Powerpuff Girls adaptations and specials, so this answer refers specifically to the original English-language television series that began in 1998.