DEVOLT

Devolt is one of the new characters introduced in Fate of Heat 2. He is a special member of Belladonna Lily, the Millefiore's Assassination Squad. He's a professional swordman and uses a Two-Bladed Sickle that he's able to turn into every Weapon in the world, like the Claiomh Solais or the Gungnir.
The first time Tsuna met this character in Fate of Heat 2, it was just Albito disguised as Devolt. A short time after, the true Devolt appeared and fought Tsuna to try and stop him from foiling Bligganteth's plans. After his defeat, he retreated back to the Belladonna Lily's Base, and he managed to become a Half-Mechanimal Beast and storms the Vongola Hideout, though he's ultimately defeated by Tsuna.