Yuno Gasai is a fictional character from the anime and manga series Future Diary (Mirai Nikki). She is known for her intense and obsessive love for the protagonist, Yukiteru Amano. Yuno is often classified as a "yandere," a term used to describe characters who are deeply in love but can become dangerously unstable and violent when it comes to their affections. Her character is marked by a duality; she can be sweet and caring one moment, and ruthless the next. Yuno possesses a unique ability called the Future Diary, which allows her to see future events. This power, combined with her obsessive nature, drives much of the plot as she seeks to protect Yukiteru at any cost.