A mischievous or cheeky person, often a child.

A rascal or rogue, someone who behaves badly but is often endearing.

बदमाश

English Usage: That scallywag managed to charm his way into everyone's hearts despite his mischief.

Hindi Usage: वह बदमाश अपने शरारतों के बावजूद सबके दिलों में अपनी जगह बनाने में सफल रहा।