Hyacinth Hippo is the lead of the dancers of the daytime and symbolizes Laura Adorno of the opera. This is deduced by the fact that she is wooed by Ben Ali Gator (who symbolizes Enzo Grimaldo) and by her deep sleep, as in the opera Laura also is sent into a deep sleep.
She makes a couple of cameo appearances in the film. Her only line is "Oh, excuse me," when she passed Eddie Valiant. When she sat on a bench to have lunch, it broke due to her sheer mass, sending a person already sitting on it flying up into the atmosphere, but several people helped her up. She later has a cameo appearance during the final scene with other Toons.
She makes cameo appearances in the series. She had a few appearances specifically in the episode "Ladies' Night" where she acts as the club's temporary bouncer and whenever Mortimer Mouse arrives, she jumps on him, which is the episode's running gag.
She made an appearance in the Christmas show, Twas the Night Before Christmas which was located in the Magic Kingdom, but has recently been retired. Currently, a poster of Hyacinth can be seen in the Storybook Circus area, also in the Magic Kingdom.