• Leader. • Main Vocalist. • Lead Vocalist. • Main Dancer. • Lead Dancer. • Main Rapper. • Lead Rapper. • Maknae. • Visual. • The one in charge of aegyo. • The one in charge of languages. • Appa/Eomma of the group. • 4D member of the group. • Shikshin of the group.
You can pick more than one. Main, is obviously the main. And lead is more like the back-up.