Sekka Yufu is a fictional character from the UTAU voice synthesizer series, often associated with the larger Vocaloid community. She is depicted as a gentle and soft-spoken girl with white hair and a scarf, symbolizing her wintry theme. Sekka Yufu is popular among UTAU users for her calm and soothing voice, making her a favorite for ballads and emotional songs. In the series, she is often portrayed as a supportive and kind presence among other UTAU characters.