>>531030445
ごめん - Sorry
スカーレット - Scarlet
遅くなっちゃって - Having become late (for you), and (I) regretfully/unintentionally ended up that way!

Full Literal
>Sorry! Scarlett, (I) ended up becoming late (for you), and I feel bad/regretful about it (it happened unintentionally)!

Less verbose version but still literal?
>Sorry! Scarlet, done ended up late!

or would you rather have actual english
>Sorry I'm late. Scarlet!