Nitro

Nitro takes the form of a little lump of blue jelly topped by a face that reads as human. A small fedora sits over the whole thing, completing the look.

Devotion to Charlotte Pudding drives the homie, which trails her almost everywhere. It shared her cruelty too, delighting in her scheme to deceive and slaughter Sanji along with his family, and breaking into wild laughter as she ridiculed him. Yet it also showed a softer side, fretting over Pudding when she grew sad on the wedding day and staying beside her when she wept over Sanji later on.

Because its body is so gelatinous, Nitro can stretch and reshape itself at will, and its surface is sticky enough to cling to people. Acting on Pudding's word, it can serve as a binding, and it held the superhumanly strong Reiju's arms locked in place. It first surfaced perched on Pudding's shoulder beside Big Mom during events at Fish-Man Island.

Through the Whole Cake Island arc, Nitro shadowed Pudding constantly: riding Rabiyan as she shielded Luffy and Chopper from arrest over the eaten cafe, sitting in on her gatherings, and listening as she and Sanji talked about the marriage. When Pudding took Reiju captive, the homie pinned the prisoner's hands while Pudding laid bare Big Mom's plot to wipe out the Vinsmoke Family at the ceremony, then howled with laughter as she mimicked Sanji. It stayed at her side as she organized the cake plan to calm Big Mom's craving illness, traveled with her and Chiffon through the Seducing Woods to find Sanji, and continued on to Cacao Island. When Pudding flustered herself after Sanji thanked her, Nitro innocently asked whom she was imitating, and it remained with her in a Chocolat Town alley as she cried over their parting.