Letty Whiterock is a fictional character from the Touhou Project series. She is a winter fairy-like youkai associated with cold and snow, known for appearing during the winter season in Gensokyo. Letty is typically portrayed as calm, gentle, and somewhat reserved, with a quiet personality that contrasts with more energetic characters. In the series, she serves as a minor but recognizable character, especially in fan works and official appearances as an early-stage opponent and seasonal figure tied to winter.