Eriko Hori was born on May 2, 1988 in Tokyo City, Tokyo Prefecture, Japan. Her stage name is "Pile", which is a material used for towels. The meaning of her stage name is: "Wrapped with warmth, an artist that will be loved by everyone". A common voice actress nickname amongst fans is "Pile-sama", though she is often called "Pai-chan" by her peers such as Yoshino Nanjo and Yurika Kubo. She voices Maki Nishikino in Love Live!.