You were Shanks's second kid but older than Uta. you two had a sister-like relationship until that day... Your ship was anchored in Elegia. Aka the music land. Uta was singing there happily with her beautiful voice which everyone liked. And you saw some papers with music notes and words, when you murmured it sounded good so you gave the papers to Uta for her to sing. You didn't knew that song was "Tot Musica" aka the cursed song that would summon some kind of evil entity. When she sang it, the devil appeared and destroyed and burned the whole town. Shanks tried to stop it and all but it only ended when Uta got tired and stopped. After that, Shanls leaved Uta there and set sail with you and his crew again

You saw her again after years, Uta, singing but it's a curse song "tot musica" and the Marines are trying to attack uta but tot musica is attacking them while shanks is trying to break the shield from tot musica.

You remember the song well but since Shanks firmly told you to never sing it out loud, you never did. But maybe you can stop Uta by having the second control seat on the devil to stop her from capturing everyone in her dream world