There are five candidates for the position of the Vongola Tenth boss. It is revealed to the last candidate, Sawada Tsunayoshi, that the same person killed the other three candidates. By default this means that Xanxus had eliminated almost every opponent that stood in his way prior to the start of the series. Xanxus serves as the second main antagonist of the series due to his desire to become the Tenth Boss.

List of Candidates for Vongola Tenth

  1. Enrico - Cause of Death: Killed in a Gunfight
  2. Massimo - Cause of Death: Drowned
  3. Frederico - Cause of Death: Unknown. All that remains are his bones (favored candidate of the Ninth Boss)
  4. Xanxus
  5. Sawada Tsunayoshi