Kohaku is a fictional character from the anime and visual novel series 'Melty Blood,' which is a spin-off of the 'Tsukihime' series by Type-Moon. She is one of the maids working at the Tohno mansion, alongside her twin sister Hisui. Known for her cheerful and energetic personality, Kohaku often hides a deeper, more complex side beneath her friendly demeanor. She is skilled in the use of medicinal and poisonous herbs, and her cunning nature allows her to play a significant role in the storyline's twists and turns. Kohaku's character adds both humor and depth to the narrative, making her a fan-favorite.