U  

U [ユー]

Yuu grew up alongside her identical twin sister. Recently, scientists have developed an even more advanced version of her, one that surpasses nature's own creation in intelligence. As this new iteration continues to evolve and contemplate its own existence, the experiment is at risk of spiraling out of control. The question arises: what distinguishes the real Yuu from her copy? And if a "copy" can now exceed its original, what does that mean for their identities? Is it still just a copy or something more complex?