Only the Dutchess & her powerful family can protect Leslie. Konrad is no match against his royal family.
He did kinda just protect her.....not even worrying about himself
If he's ordered by his father or uncle the Emperor to help them attain the power of the dark saint he doesn't have the same power or status as the Duchess to defy the royal family and become their enemy. Remember the marquis & queen aren't gonna forget his meddling and their not just gonna let go of their ambitions.
I WOULD DIE FOR KONRAAAAAAAD HES SUCH A PRECIOUS BALL OF FLUFF THAT ONLY WANTS TO SEE LESLIE HAPPY IM SO EMO PLS PROTECT HIM