Yumeko has an immediately captivating presence, largely due to her signature style and striking features. She possesses long, silky black hair cut in a traditional hime-cut style, featuring sharp, straight bangs across her forehead and blunt chin-length side pieces. Her complexion is pale, complementing her distinctive large eyes, which are typically a warm burgundy color but dramatically shift to a startling, vivid crimson when she becomes consumed by the excitement of a gamble.