Sion Eltnam Atlasia is a prominent character in the Melty Blood series, a fighting game franchise that is a spin-off from the visual novel Tsukihime. She is an alchemist from the Atlas Academy, a secretive group known for their mastery of magical sciences. Sion is intelligent and resourceful, often seen wearing her distinctive white lab coat. Her primary goal is to find a cure for vampirism, and she becomes deeply involved with other key characters to achieve this. Sion is a complex character, balancing her scientific pursuits with personal struggles, making her a pivotal figure in the series.