Arc 6Sanji Joins the Marines
Yamato accepted that she could honor Oden while living as herself, while Naito ended a war, recruited Golden Lion Shiki as an ally, and took Sanji aboard his ship. The arc left Sanji awakening his Lineage Factor and testing his new speed, strength, and durability against Binz.
- Yamato reconsidered her belief that she had to become Kozuki Oden and chose to pursue her own adventure as Yamato.
- Naito stopped Germa 66's assault on the Fromm Kingdom, subdued Vinsmoke Judge, and ended the war between the Fromm and Natura Kingdoms.
- Naito's projection ability evolved, and he defeated Golden Lion Shiki before arranging to buy Shiki's islands, beasts, and research.
- Naito intervened when Judge came to reclaim Sanji at the Baratie, and Sanji agreed to leave with Naito to protect Zeff and the restaurant.
- Naito persuaded Judge to give Sanji the Stealth Black Raid Suit, which Sanji tested by transforming, flying, and demonstrating its defenses and invisibility.
- Naito met Garp, Ace, and Luffy in Foosha Village and easily defeated Ace and Luffy in a demonstration of his strength.
- Sanji's Lineage Factor awakened during training, and he refused Judge's demand to return to the lab.
- Sanji fought Binz to test his awakened abilities, displaying exceptional speed, increased strength, and durability as Naito called for Binz to use Haki.