Idea I got just from watching Kardashev scale videos: Sayori and Sephiroth fuse together and become a single entity, known as Sephyori, but will be mistakenly classified as 525 as well, achieved by adding 478, Sayori’s misclassification codename, and 572, Sephiroth’s misclassification codename, and dividing the sum of both codenames by 2. Having considered the fusion of a male and a female, 525 would likely not have a gender at all. With all that said, 525 will attempt to assert control over reality itself, having gained all of the knowledge possible
The only known constraint to a 525 fusion, however, would be the concept of a they/them genital, which would likely be too much to handle
