Ace the Bat-Hound

A stray dog adopted by Batman and Robin, Ace became the Dynamic Duo's loyal canine companion, often accompanying them on cases in Gotham City. He wore a small bat-insignia mask to conceal a distinguishing mark that might reveal Bruce Wayne's secret identity.

Few four-legged characters in comics have earned their place in the DC universe quite like Ace the Bat-Hound, the canine companion who first bounded onto the page in 1955's Batman #92 — a Golden Age debut that launched a legacy stretching a remarkable seven decades. Ace has shared adventures alongside some of DC's most iconic figures, keeping company with Batman, Robin, Dick Grayson, Bruce Wayne, and even Green Lantern across titles ranging from the storied Batman and Batman: Detective Comics to the charming all-ages favorite Tiny Titans. That range — from serious Bat-family adventures to delightful kid-friendly fare — speaks to just how warmly this good boy has been embraced across generations of readers. With a key issue among his appearances and a publishing run that stretches all the way to 2026, Ace is living proof that loyalty, in comics as in life, is truly timeless.