As of now, Uta is indeed alive. The story hasn't depicted anything otherwise. Maybe there'll be changes in the future, but for now, Uta's part in the manga continues with them being alive.
Their relationship could start with Uta being initially distrustful of Luffy. After all, Luffy is a pirate and Uta has her own ideas about pirates. But as she sees Luffy's pure heart and his determination to protect his friends and pursue his dreams, she starts to warm up to him. They might then become friends who share their different stories and experiences.
Perhaps 'y' is a relative of Harry's that was thought to be dead. This relative could have a unique magical heritage that they pass on to Harry, making him even more powerful. For example, if 'y' was a distant cousin from a line of powerful seers, Harry might develop some precognitive abilities.
😋I recommend the following novels to you. I hope you will like them:
1. "Illusionary World Record"-a mystery detective novel by a bad seedling.
2. "Step by Step, Beauty"--Ancient romance, classical fictional novel, author: Qi Lan.
3. 'The Most Powerful Good Man in History' was a sci-fi doomsday crisis novel by September Pegasus.
I hope you like my recommendation. Muah ~ If you have any other needs or ideas, please feel free to tell me.😗
I'm not entirely sure specifically what 'oni uta visual novel' is about without more context. It could potentially be a visual novel related to oni (which often refers to demons or ogres in Japanese culture) and perhaps involve a story, characters, and interactions within that theme.