Of the many Infernal Demons that can be summoned by Bayonetta during a Climax Attack, the Little Devils are an obscure reference to JoJo's Bizarre Adventure, more specifically Guido Mista's Sex Pistols. Director Hideki Kamiya has mentioned during a commentary that, much like Sex Pistols, each of the five devils have their own personality, and have a number written on their foreheads, with the #4 missing as it may be considered very unlucky by Zero, the King of the Little Devils.
Contributed by GhostLight