What is the definition of Characters Engineering?

Characters engineering is like the art of meticulously crafting a character's personality, backstory, and motivations, but instead of a painter using brushes, it's a character strategist using spreadsheets and psychological profiles. It's the process of shaping someone (or something) into a delightful, coherent, and often relatable character, like turning a cardboard box into an over-the-top, absurdly heroic superhero.

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Now, here's an edgy example sentence using this term: "After months of characters engineering, our screenplay's protagonist is now a brooding, existential crisis-ridden, 17-year-old who believes the universe is trying to tell him to eat his vegetables, and his only weapon is a katana."