Epsilon serves as the sixth founding member of Shadow Garden and occupies the fifth seat among the elite Seven Shadows. Her public facade is Shiron, the celebrated pianist and composer. She performs music from Earth, taught by Shadow, granting access to infiltrate influential circles within the Midgar and Oriana kingdoms. An Elf, she possesses sharp facial features, long azure hair typically in pigtails, and light blue or purple eyes. Her naturally petite physique is altered by a specialized slime bodysuit. This suit artificially enhances her bust, hips, and height, crafting a more curvaceous silhouette. The thickened padding also provides formidable physical defense. Her standard Shadow Garden attire includes this dark slime suit accented with gold and purple, a purple scarf, and sometimes a mask for anonymity. Her personality blends intense pride, stubbornness, and competitive drive with underlying compassion for allies. This pride stems from her noble upbringing and a deep desire to distinguish herself within Shadow Garden, where she once felt overshadowed. Her focus on physical enhancement through the slime suit originates from a wish to appeal to Shadow out of gratitude, not vanity. Despite her haughty demeanor, she accepts responsibility for her errors. In combat, Epsilon excels in precise magic control, recognized as the best among the Seven Shadows in this domain. This skill allows her to reverse Possession effects and heal non-lethal injuries, though scarring may remain. Her swordsmanship rivals Beta's, and she has demonstrated parity against high-ranking foes like Mordred of the Knight Rounds. She manipulates her slime suit to launch bludgeoning or cutting attacks of pure magic and wields slime-based weapons—usually a sword, though a harp-styled scythe appears in game adaptations. The suit's padding augments her defensive capabilities. Her background includes intensive training in aristocratic etiquette and military arts, later refined under Lambda's guidance. Recruited into Shadow Garden as a child, she received "Shadow Wisdom" from Cid, contributing to her development into a prodigious operative. Key events across media include her near-exposure by Mordred during an Oriana infiltration (a storyline later adapted for Victoria in the light novels) and participation in missions like investigating the Sanctuary. Game-exclusive events feature competitive scenarios with other Seven Shadows, such as a beach resort rivalry with Beta centering on artificial versus natural physical traits. Her intelligence operations gather political and social information through her musical career and aristocratic connections. Despite her confidence, she harbors insecurities about her natural physique, fueling ongoing efforts to conceal her reliance on the slime suit—a secret known only to Cid, Delta, Omega, and Chi. In one manga extra chapter, she bribes Delta with food to prevent further investigation into her scent, which often betrays the suit's presence. Relationships within Shadow Garden feature a notable rivalry with Beta, often depicted in synchronized combat or competitive interactions, and collaborations like her etiquette training with Lambda. Her unwavering loyalty to Shadow drives her actions across all narratives.