Haku Yowane is a derivative character from the VOCALOID universe, originally created as a fan-made character. She is portrayed as a melancholic and somewhat pessimistic singer, often depicted with silver hair and a purple-blue color scheme. Haku represents users who struggle to use the VOCALOID software successfully, embodying themes of frustration and self-doubt. While not an official VOCALOID, she has gained a significant following and appears in various fan works, music videos, and illustrations, acting as a symbol of perseverance.