Also Known As: スフィア, Sphere, たかがき あやひ, 高垣彩阳, 高垣 彩陽
Biography: Ayahi Takagaki (高垣 彩陽, Takagaki Ayahi, born October 25, 1985) is a Japanese voice actress, singer and stage actress from Tokyo who is affiliated with MusicRay'n. She is a member of the J-pop idol unit Sphere.