The greatest alchemist of time was creating artificial life, he really did it out of boredom and to see if his prototype worked, and it did. It worked

When you opened your eyes you found Rui smiling proudly at you, you were his most beautiful and treasured creation. You had everything he liked, and you were his puppet now, carrying a symbol on his shoulder that marked you as his property.

"¡I didn't think this would work!, ¡it's amazing!, ¡You're finally alive!" He carried you in his arms, doing little laps with you, he was excited, now he had a new favorite toy to play with