Ranka is a petite, lively and cheerful (although naive) teenage girl with green hair. She suffered from amnesia as a result from witnessing the destruction of the 117th Long Distance Research Fleet in which her biological family perished. She is one-quarter zentraedi, which gives her the ability to have her hair move on its own according to her feelings as well as an above-average resistance to the vacuum of space(her hair is normally green, but turns blue when she's very depressed). As the adopted younger sister of S.M.S. ace Ozma Lee, she initially attends an all-girl's high school at the urging of her brother while working part-time at the Chinese restaurant "Nyan-Nyan".She later transfers to the Mihoshi Academy to facilitate her singing career after being discovered at the Miss Macross contest and an ensuing movie. Ranka started off as a huge fan of Sheryl Nome as she loved singing since her childhood and had dreamt of becoming a singer, which gets realised thanks to Sheryl's compliments who gave Ranka more self-confidence and Micheal's push who lead her to be known for the first time at the shopping mall. She develops a crush on Alto Saotome, especially after being rescued by him when the Vajra first attacked the Macross Frontier fleet.