Uta's idea of what the world should be like makes her similar to Madara and Obito Uchiha. It also might make her a danger to herself and others.
In anticipation of One Piece Film: Red's theatrical release on Aug 6, One Piece's official YouTube channel has released UTA diary. This micro-series has the eponymous songstress address her fans via Video Transponder Snail to tell them a little about herself and her plans for the upcoming concert. On the surface, it sounds pleasant, but its undertones are rather troubling.
Uta has a problem with all the pain and suffering in the world brought about by pirates. She intends to help people escape from that pain by singing for as long as she can. Her hope of escaping from a cruel reality might not sound too bad at first, but it also sounds an awful lot like the ideology of two of Naruto's greatest villains, Obito and Madara Uchiha.
A major factor in what makes Uta think the way she does is her background. She doesn't go into specifics in the videos, but she does give a general idea of how she felt growing up. She described her early childhood as a time when she was protected and didn't know about the woes of the world brought about by pirates. When she realized this truth, not even her favorite song, "Where the Wind Blows," could comfort her; to her, pirates are to blame for her not being able to sing this song anymore. All of this may or may not have something to do with the tragedy of Elegia, the site of her upcoming concert.
Uta was depressed and alone, with only her singing to comfort her for a long time. She learned to love herself again when she realized how much people loved her music; the lyrics to "I Am Invincible" embody this change in her life and her gratitude towards those listeners. She still recognizes the anguish in the world, but she and her fans find refuge in her music.
Unfortunately, Uta doesn't have a lot of contact with the outside world. She spends most of her time in her room practicing her songs and dances. She's only ever performed on livestreams via Video Transponder Snail; the concert in Film: Red will be her first live performance. She receives messages from her listeners but never any direct contact. She seems satisfied, but that kind of a sheltered life couldn't have had a good effect on her understanding of the world.
Of course, this doesn't make her hatred of pirates any less justified. They can be awful people willing to hurt others for the sake of treasure and money, and Uta can't understand that mindset, which makes her hate pirates with all her heart.
To really understand what makes her dislike pirates, she doesn't tell her own story but rather that of a fan. She used to get letters from a bedridden girl whose family and home were destroyed by pirates; her only remaining joy in her short life was Uta's music until the day she died. Uta understands that others like that little girl seek to escape into her music, which is why she intends to sing up to thousands of songs for her concert. She gets surprisingly worked up talking about all of this, which comes off as both passionate and a little unstable.
Uta believes that music, in general, has the power to change a person's heart. Even if reality can't be changed, the way one perceives and feels about the world can be changed. She believes that music, hers especially, is helpful in this regard.
She also talks a little about her song "The World's Continuation" and its connection to her ideal dream world. She wants a world without fighting that's instead full of fun things and music. She believes she'd be perfectly fine with a dream like that going on forever as she'd be happier that way.
This escapist idealism is where the parallels to Madara Uchiha become especially obvious. Just like Uta, he believed the world was caught in an endless cycle of suffering. However, unlike Uta, he had a definite means to do something about it.
Madara sought to stop the world's suffering with the Infinite Tsukuyomi, which would force everybody into an everlasting illusion of their ideal world. Obito joined in on this plan so he could live in a dream world where his true love Rin never died. To these two, living in such an endless dream world was preferable to the despair of reality.
It remains uncertain whether Uta would be willing to go as far as creating an Infinite Tsukuyomi of her own. It's not even clear whether she has that potential or even what her powers are. However, how her music is described and how she talks about her upcoming concert suggest that she might.
Her plan to help everyone escape into a dream world sounds like big talk, but there may be more. In promotional material, her singing has been described as "otherworldly," which may also tie into her powers. It could mean that she has the ability to manifest her music physically. Therefore, her singing could be "otherworldly" because it transports listeners to another world.
Assuming she can alter reality with her singing, she may be planning to bring her audience into her ideal dream world with her song "The World's Continuation." She describes it as a song for "chasing away all the scary things in the world and bringing everyone to a kinder place," or at least that's what she hopes. She'll keep singing for as long as possible to keep people in that dream world.
If all of this is, in fact, possible, then it makes some of Uta's other statements a lot more concerning. She mentioned how she would "write over everyone's sad memories." Assuming this pertains to her powers, she essentially plans to brainwash everyone. She also said that her concert would "take everyone to a place [they've] never seen before," which would be in line with the fact that no one has really heard "The World's Continuation" yet. Her description of "The World's Continuation" also aligns with her claim that she would "change Elegia into a wonderful place full of music." Finally, she boldly declared that her concert would be "the start of a new era;" coming out of the wrong mouth, this could be a troubling statement. Whatever the case, she has big plans for this concert.
As for whether she can implement her plan on a global scale like the Infinite Tsukuyomi, the answer might be yes. Again, her music was described as otherworldly before she ever put on a live concert; that means her apparent ability must extend to those who hear her songs through indirect sources like a Transponder Snail. This might be backed by the fact that the sick girl was able to get the same satisfaction from listening to Uta's songs through a Tone Dial. Since Uta will be live-streaming her concert, even those not in attendance will be affected by it.