Characters
Be whatever you want – you’re my redhead.
— Dexter · The Philadelphia Story

Behind the line May contain spoilers.
Our reading
An editorial interpretation.
The speaker tells someone they are free to be whatever they want, while affectionately calling them 'my redhead'. The line joins acceptance of change with a familiar term of endearment, suggesting that choosing a different role or identity need not disturb this personal bond.
Context reviewed