Under the direct command of the "Ten Dons," supreme leaders of the Mafia Community, every beast has his own code name that derives from the animal which inspired him to develop his Nen abilities. These warriors individually accompany the Ten Dons around the globe in their every move. This group ceased to exist because of the Phantom Troupe, who wiped them all out without mercy on a single night, except for Owl who was taken to be interrogated.
Yorknew City arc
After a large number of Mafia members and auction clients in Yorknew City are massacred by the Phantom Troupe, the Ten Dons send the Shadow Beasts to deal with them, not knowing who they are. Uvogin faces four of the ten Shadow Beasts and kills them. Afterwards the remaining Shadow Beasts are subsequently killed, aside from Owl so the Ten Dons put large bounties on the Spiders' heads and hire professional assassins, including Zeno and Silva Zoldyck, to eliminate the Troupe members. Illumi Zoldyck later kills the Ten Dons and controls their corpses to cancel the bounties on the Phantom Troupe.
|Members||Leech • Owl • Porcupine • Rabid Dog • Worm • ??? • ??? • ??? • ??? • ???|
|Families||Buor Family • Cha-R Family • Heil-Ly Family • Nostrade Family • Ritz Family • Xi-Yu Family|
|Independent/Unknown affiliation mafiosi||Bean • Rottfelli • Trink • Zenji|
|Individuals||Unnamed Hacker • Conditional Auction Announcer|