Sapphire Judge (Undertale x BNHA Crossover)

Sans world gets reset and he finds himself transformed into a human girl in a world of heroes and crime. She, however, is all alone, her friends and brother all lost to the past, lost to the last world that she now only has in memory. With this new life, she vows to learn to become a hero, so she can save those who cannot save themselves. She wants to better herself because of all of her past failures. Maybe, in this world, she can make a difference, and not have it all rewound.

What happens when the other versions of herself FINALLY find her again, after 4 years of being missing, and not resurfacing?

'It's a beautiful day outside. Birds are singing, flowers are blooming. On days like these, villains like you, should be behind bars.'