乙坂有宇 (Ousaka Aru) is a fictional character from the visual novel and anime series Charlotte. He is a high school student with the ability to temporarily possess others' bodies, which he uses to navigate various challenges throughout the story. Aru is known for his laid-back personality and often finds himself in humorous situations due to his powers. In the series, Aru is a member of the Sakuraba Academy student council and works alongside other characters with special abilities. His journey involves discovering the consequences of his powers and the importance of friendship and responsibility. Aru's character development is central to the narrative, making him a relatable figure for viewers.