Who was Hildy and Holly on horton hears a who?

Hildy and Holly are characters from the animated film "Horton Hears a Who!" based on the Dr. Seuss book. Hildy is a female character who is a member of the Whos, while Holly is her daughter. They add depth to the story, showcasing the community of Whoville and their efforts to be heard by Horton, the elephant who believes in their existence. Their characters help highlight the themes of friendship, courage, and the importance of every voice being heard.