Violet is from the Marvel Cinematic Universe.Her overall physical prowess suggests shes from a world where Gods, Aliens, Mutants and Super Heroes are the norm. Her appearance indicates she's an Asgardian. She lived on Asgard until Hela arrived and her people fled on a ship when its destroyed. However, Thanos caught up to them due to wanting the Space Stone from Loki. Before Thanos's forces boarded the ship, her parents teleported her outside the universe and into this one which also spared her when Thanos has all six Infinity Stones.
WMG / Violet Evergarden