Vindice
Vindice are the masked keepers of Mafia law who punish those who cannot be judge by normal law. Those who defy their law are arrested without any hesitation and imprisoned in inescapable prison known as Vendicare Prison. The Vindice has been around for as long as the Mafia exist. Their reputation among Mafia world precedes them, as they are said to show no mercy even to devils. They are said to have no emotions other than hatred. They possesses the Flame of Night that governs by a set of law that allows them to transport anywhere they want. The Vindice are revealed to be the previous Arcobaleno who were in the past, tricked and cursed by Checker Face. They, who had their Pacifier removed from them were mostly dead and even the ones who managed to survive had a cursed lives afterwards that only desiring for revenge, making them the way they are now. All the Vindice, aside from Bermuda, are unable to create their own flames and merely survived by the flames provided by Bermuda. After they were defeated by Tsuna and his friends, they agreed to protect the Tri-ni-set for eternity that had been place in jars specifically created by Talbot with Bermuda's Flame of Night as support to prevent another generations of Arcobaleno.
Read more about this topic: List Of Reborn! Antagonists