It sounds like you're referring to (often spelled Valya or Valeria depending on the source), a character from the Dune universe.
Since your query is short, here is the most about her—summarizing her identity, role, and key facts from the expanded Dune lore (primarily the Legends of Dune and Schools of Dune series by Brian Herbert and Kevin J. Anderson). Who is Valeria Atreides? Full name: Valeria Atreides (sometimes "Valya" as a nickname, but note: Valya Harkonnen is a different, more famous character from the Sisterhood of Dune era).
