Jinpachi Nezu is the head of a band of pirates controlling Lake Biwa.
He likes to be a real maverick and hates being tied down. He loves, women, sake and his pirate ship. His partner is a black panther named Veronica.
You first see when Jinpachi when he rescues the other Braves when Saizo and the others are in a middle of a fight and are about to bet defeated. On board his ship, they see that Kakei is there and he told Jinpachi to save them. When they get on the ship he mistakes Yuri for a woman and then being shocked right after he was told he was a guy. Isanami tells him that she's a girl to, but he rejects her because of her being so young and having a small chest, which she did not appreciate. He then tells the others that if they can drink all the barrels of sake he has lying around, they can stay on his ship, this is something that everyone agrees to do. After a while they end up drinking more than they can handle (except for Kakei and Saizo ). In the end they end up drunk and fall asleep on deck.
Afterwords Jinpachi and Veronica go back to Ueda to join the Braves, this makes him the tenth person to join with Yukimura, making it complete. Although Jinpachi is just interested in Juzou's promise to meat with the "gorgeous buxom blonde" within the Braves who is Anastasia.