Mary Alice Forrester

Mary Alice Forrester (メアリー・アリス・フォレスター) is the main character of Alpha Battle. She is the long-lost younger sister of Sebastian Harper and Avni Harper, the biological daughter of Frank Harper and Ava Harper, a former police officer, the current "Alpha Red", and the leader of the Alpha Rangers.

After her birth, Mary Alice was secretly given to another family, while Frank and Ava were told that the latter had suffered a miscarriage. Years later, Mary Alice was told of her actual family and set out to find them. Encountering the hero known as Omega, Mary Alice immediately idolized him and eventually discovered his identity as Sebastian, her older brother.

After the defeat of Prometheus, Sky Tate and Shane Cole give their team, the Alpha Rangers, to Mary Alice. As the new "Alpha Red" and leader of the Rangers, Mary Alice recruited Rudy Collins, Mark Merrick, Bridge Larson, Jen Scott, and Sam Austin to form the new Alpha Rangers. Following the death of Rudy and Will Brady's retirement, Mary Alice recruited Rachel Hathaway.

Battling villains such as Morax, Slade, and Grim, she was deeply affected by the Dark Rangers, and captured years later by the Brotherhood. She was later freed by Sebastian Harper, and she aided him in his final attack on the Brotherhood.