Recurring characters in this episode include glee club members Mike Chang ( Harry Shum , Jr. ) and Sam Evans ( Chord Overstreet ) , Principal Figgins , school bully Dave Karofsky , cheerleader Becky Jackson ( Lauren Potter ) , wrestler Lauren Zizes ( Ashley Fink ) and Kurt 's friend Blaine Anderson .
The main characters in this episode include glee club members Mike Chang ( Harry Shum , Jr. ) and Sam Evans ( Chord Overstreet ) , Principal Figgins , school bully Dave Karofsky , cheerleader Becky Jackson ( Lauren Potter ) , wrestler Lauren Zizes ( Ashley Fink ) and Kurt 's friend Blaine Anderson .