1. Fanfiction or Character Story

If "Agent Red Girl All My" refers to a character or a storyline from a book, movie, or TV show, here's a brief story:

Story:

Gaming Identity: For players, using the Agent Red skin is a way to signal a specific playstyle—aggressive, fast, and flashy. How to Achieve the Agent Red Aesthetic

What to Do Next

However, due to her breathy vocal fry and a heavy bass drop, millions of listeners misheard the line as "Agent red girl all my..." (reversed syntax). The official music video—which features the singer wearing a crimson blazer and earpiece—didn't help clarify things.

In the viral bridge of the song, Sunny sings: