North, who died in 2017 at 71, made her debut in 1971 on the Saturday morning cartoon “Scooby-Doo, Where Are You!” and voiced the redheaded, fashion-conscious teen for three decades. Kenney, who died in 2015 at 89, was a five-time Emmy winner, working on such soap operas as “Days of Our Lives,” “The Young and the Restless” and “General Hospital.”