It's not called talent, it's called forceful plot.
forceful plot obliges your childhood friend (female only) to be better than you in something instantly, no mather how much effort you put on it.
She will never steal your spotlight, but as you progress through effort, she will progress equally, even if she doesn't put any effort, as seen in countless chinese manhua.
It may seem unfair, but it's the price you must pay to add the Romance tag to your fantasy manga.