Retasu Midorikawa is one of the main characters in the anime and manga series Tokyo Mew Mew. She is a gentle and shy girl who transforms into Mew Lettuce, gaining the DNA of the finless porpoise. As a member of the Mew Mews, Retasu supports her friends with her intelligence and kindness, often providing a calming presence within the team. Her journey involves overcoming her insecurities and learning to believe in herself while fighting to protect the Earth from alien threats.