Billy Batson of Earth-S
From superman.nu: Supermanica
Billy Batson of Earth-S
The lad, who with one magic word—"SHAZAM!"—turns into "The World's Mightiest Mortal" of Earth-S, Captain Marvel. Billy is granted this unique transformative power by the wizened wizard, Shazam (first appearance: Whiz Comics No. 2, Feb 1940: "Introducing Captain Marvel").
Billy works at radio station WHIZ.