Blackjack is Jack Kennedy's soul, which took form of his childhood dog, Sparky, and trapped Henry in the void. He is often angry and resentful, and incredibly stubborn. He takes the appearance of a ghostly shadow dog, wearing a golden tophat and bowtie. He seems to be especially angered around Jack, seeing him as nothing but a "hunk of reanimated flesh that thinks its him, that he was the real Jack Kennedy that died the summer of 1973." Uncomfortable around Dave. Hates Henry. Speaks in caps.