Belphegor (ベルフェゴール) is an assassin working for the Vongola's independent assassination squad, the Varia. He is known as "Prince the Ripper" (Purinzu za Rippa). Once a prince of an unknown country at age eight, he stabbed his identical twin brother, Rasiel, presumably to death. It was later revealed during the Future Arc that this was not the case. Bel has a crescent-shaped birthmark on the right side of his stomach which mirrors Rasiel's. He is known as a battle genius, but his abilities only truly present themselves when he sees his own "royal" blood, which reminds him of the time he stabbed his brother. His eyes are never shown, but in Volume 24, Lussuria says that his eyes are both cool and loyal in his interview.
Belphegor represented the Storm Guardian of the Varia and fought Hayato Gokudera in the Storm Ring Battle. At first Belphegor seemed to have the advantage, confusing Gokudera with his techniques, but he was eventually outwitted. However, spurred on by his instinctive desire to win, Belpegor struggled with Gokudera who (as the area was rigged with explosives) eventually gave up, leaving Belphegor the winner. During the Sky Ring Battle Bel, like all of the guardians, was incapacitated with a poison. Xanxus gave Bel the antidote, but he was confronted by Hibari. Bel retreated after injuring him and went to cure Mammon. They proceeded to hold Chrome hostage in order to get the rest of the Vongola Rings from Gokudera and Yamamoto. Mammon and Bel were successful; however, they were disqualified and later surrendered the Rings.
During the main battle in Italy, Belphegor was ordered by Squalo to work with Fran and hunt down the Funeral Wreath in charge. They eventually encountered Olgert and to Belphegor's suprise the Funeral Wreath was his supposedly dead brother - Rasiel, who claimed to have been brought back to life by Byakuran. Rasiel then incapacitated them. However, Fran was able to use an Illusion to fake their deaths so that they could escape.
Arcobaleno Trials Arc
When Tsuna and company go back to the past for the Arcobaleno Trials, Belphegor and Mammon infiltrate Tsuna's school by using the mist to disguise themselves as the two tranfer students, Monta and Himeko Hariyama. This is to help Viper perform his trial. After the trial, he was seen eating sushi at Yamamoto's dad's sushi place.
The Varia later arrived to rescue Lal Mirch, Gokudera, and Gamma from the Six Funeral Wreaths. Along with Lussuria and Leviathan, Belphegor was killed by Bluebell. However, this was revealed to be an Illusion created by Mukuro Rokudo. Later, Bel, along with everyone else present, had his Dying Will Flames drained by Ghost.
Knives and Wires
- Belphegor uses throwing Knives and nearly invisible Wires to confuse and cut his enemies. While his enemies usually concentrate on the Knives, they are either being cut or trapped by the Wires.
- Storm Mink - Belphegor's Box Weapon, a small Mink with fur that generates Storm Flames that degenerate anything it touches. It moves at blinding speeds, making it highly impossible to avoid its deadly attack. It can also produce a Flame shield by rapidly rotating its tail.