Ernie was a boy, one of the orphans at Midvale Orphanage in 1960. After a private screening of "The Supergirl from Krypton" at the orphanage, he remarked to another boy that it would be great if there were a real Supergirl on Earth, living as one of the girls at the Orphanage; specifically Linda Lee. ("The Mystery Supergirl!")

His reasons for specifying Linda are unknown. He may have had a crush on her or considered her a friend; neither situation is explained in the story.