Death's Head Caucus is a Dark Guild that is known for being unmatched in its number of successful assassinations. It seems to be a powerful guild, as three of its members were able to match or overpower S-Class level Mages such as Natsu Dragneel, Gray Fullbuster, and Juvia Lockser. And their leader, Ikaruga, was able to overpower Erza Scarlet for the majority of their battle.
Members
| Name | Rank | Team | Status |
| Ikaruga | Mage | Trinity Raven | Unknown |
| Vidaldus Taka | Mage | Trinity Raven | Unknown |
| Fukuro | Mage | Trinity Raven | Unknown |
| Legal Magic Guilds | Blue Pegasus • Diabolos • Dullahan Head • Dwarf Gear • Fairy Tail • Gramlush • Hound Holy • Lamia Scale • Magia Dragon • Mermaid Heel • Mount Altana Guild • Orochi's Fin • Phoenix Grave • Quatro Cerberus • Sabertooth • Scarmiglione • Titan Nose • Twilight Ogre |
| Other Guilds | Butterfly Horn • Carbuncle • Fairy Nail • Edolas Fairy Tail • Gagarock • Lead Eagle • Love & Lucky • Southern Wolves • Sylph Labyrinth |
| Independent Guilds | Crime Sorcière |
| Former Legal Guilds | Cait Shelter • Gold Owl • Phantom Lord • Raven Tail • Red Lizard |
| Dark Guilds | |
| Dark Guilds | Dark Unicorn • Death's Head Caucus • Fire and Flame • Harpuia • Naked Mummy • Red Hood |
| Former Dark Guilds | Blue Skull • Edolas Fairy Tail • Eisenwald • Ghoul Spirit • Grimoire Heart • Oración Seis • Raven Tail • Reborn Oración Seis • Succubus Eye • Tartaros |