Wikipedia
The Vault-Keeper was the host for The Vault of Horror, a horror comic published by EC Comics from 1950 until 1954. The Vault-Keeper was one of three hosts for EC's horror comics (known as the GhouLunatics), along with the Crypt-Keeper and the Old Witch. He served as narrator and was also there to add a lighter touch to the often gruesome stories with puns and humorous commentary. In addition to the appearances in his own book, he also had a guest story in each issue of Tales from the Crypt and The Haunt of Fear.
He was a ghoul, and unlike the Crypt-Keeper or the Old Witch, he has a merrier personality and light-hearted approach. However, he and the Crypt-Keeper are involved in a love triangle with the Old Witch, and there is much competition between the three, each believing their stories to be better. Although both the Crypt-Keeper and the Old Witch received "origin stories" in Tales from the Crypt #33 and Haunt of Fear #14, respectively, the Vault-Keeper's origins were never revealed.