Skull

スカル

Holder of the Purple pacifier.
Head of the Calcassa Family's combat forces. He wears a full leather outfit and a motorcycle helmet, a style copied by all his subordinates.
However, Skull is not as powerful an infant as Reborn and Colonello, having been beaten by Reborn (before his first appearance in the manga) with great ease. He is looked down upon by the other two and was even called stupid by them. He calls the two his senpais and is easily irritated by Reborn's comments about him and his pet octopus; Reborn keeps telling him to eat the octopus already. Reborn considers Skull to always be someone's errand boy, and Skull, to his dismay, does not deny the fact that the only person he was an errand boy to was Reborn.
Skull's pet is a giant armored octopus. The octopus' tentacles follow Skull's hand and finger movements. Source - Wikipedia