Valérie Muzzi is a Belgian voice actress born on September 7, 1977. She trained at the Institut supérieur des Arts du Spectacle de Bruxelles and complemented her studies with a degree in performing arts and a year of film studies in Rome. Her professional activity is centered in studio work, including dubbing, voice-over, radio, and advertising.

Muzzi is primarily known for her contributions to the French dubbing of anime series. One of her most prominent roles is Nikki Hanada in the long-running science fiction series Dr. Stone, a character she has voiced across multiple installments including Dr. Stone: Stone Wars, Dr. Stone: Ryusui, and Dr. Stone: New World. She also voiced the character Majiri Agakura in the fantasy series Dead Mount Death Play. Her other notable anime credits include Flora in Dragon Quest: The Adventure of Dai and the android A2 in NieR:Automata Ver1.1a.

Beyond these roles, the specific parts of Belzébuth in I've Been Killing Slimes for 300 Years and Maxed Out My Level, Ate de la Ruine in Saint Seiya: Saintia Shō, Lune in The Princess and the Moon, and Mère in The Prince and the Coral Sea, as mentioned in the query, could not be confirmed as part of her filmography.