Amy Mizuno is the top-scoring student at Crossroads Junior High School. Amy transferred to this school from Brighton Academy, when her mother transferred to the Crossroads Hospital. At first, Serena and her friends thought she was a stuck-up brain farm reject, but Serena became good friends with her and discovered the Amy's true character. Amy is someone who cares deeply about her friends and tries her hardest to reach all of her goals in life. Amy has short hair, which suits her quiet personality, and doesn't have a sense of fashion, unlike the other girls. Even though Amy is smart, she doesn't brag about her high grades, because she knows it will only make Serena (who is a bottom-scoring student) upset. When Amy first came to Crossroads Junior High, she was suspected (by Luna) to be a Negaverse spy. It was then later discovered that she was the Sailor Scout of the planet Mercury, Sailor Mercury. A another Sailor Scout to fight for truth, love and justice alongside Sailor Moon. She is quick thinking and uses her Mini-Data Computer & VR Visor to help her and her fellow Sailor Scouts in battle. Serena Tsukino befriended Amy Mizuno very quickly, and since then they have had a special unbreakable bond, & Amy cherishes this friendship.