Erika is 13 years old and Tsubomi's classmate and neighbor and daughter of the owner of the fashion shop "Fairy Drop". In addition, she is the president of the Fashion Club. She loves fashion and designing her own clothing. She has a jealous complex towards her beautiful and fashionable older sister, who is a Charisma Model despite still being in high school. She is an energetic girl and bluntly says what she is thinking, although she also begins to change after meeting Tsubomi. She makes Tsubomi join the Fashion Club after all old members signed off. After she is informed the qualification of Pretty Cure, she agrees to help in the fight of Tsubomi. As Cure Marine, her theme color is blue and her flower symbol is the Cyclamen. She has powers related to the ocean and can use auxiliary attacks such as Marine Shoot and Marine Dynamite in addition to her finishing attack. Her catchphrase is "Even someone like me, with a heart as wide as the ocean, is at her limit!"