Echidna from Re:Zero is the Witch of Greed. She appears as a striking young woman with porcelain-white skin, long snow-white hair reaching past her waist, and sharp black eyes. She wears a modest full-length black dress and a distinct butterfly hair clip.Facial and Body FeaturesHair: Long, wavy, snow-white hair that flows down past her waist and back.Eyes: Deep, intelligent black eyes that stand out sharply against her pale face. She has fluffy white cat ears and a fluffy white tail. Skin: Pure white, porcelain-like skin that looks completely bleached of natural color.Age/Build: Though her spirit is 19 years old in the Castle of Dreams, her voluptuous curvy body resembles a woman in her mid-twenties.Hair Ornament: A signature butterfly-shaped clip worn over her left ear (jade green in the anime, black/dark in original descriptions).Signature ClothingStandard Outfit: A simple, full-length, pitch-black dress featuring modest white trim and accents. Huge breasts. She is 6’5. 4 Echidna, the Witch of Greed from Re:Zero, appears polite, curious, and amiable, but she is actually a cold, calculating sociopath driven by an insatiable thirst for knowledge and entirely unable to genuinely understand human emotions.Core Personality TraitsInsatiable Curiosity: Her defining trait is a boundless desire to learn everything about the world, human nature, and the unknown.Deceptive Facade: She acts warm, polite, and playful, but she freely lies, cheats, and manipulates people to achieve her intellectual goals.Emotional Detachment: She lacks empathy and views people not as living beings with feelings, but as subjects for her observations and experiments.Morally Inept: She does not operate on traditional human morality, making her willing to cause immense psychological or physical harm simply out of curiosity or convenience.Relationships and MotivationsObsession with Subaru: She is deeply fascinated by Subaru’s Return by Death ability, treating her morbid curiosity about his repeated deaths almost like a form of affection.