The Egghead Island arc is the first arc in the final saga of One Piece. It is set on Egghead Island, the home of renowned scientist, Dr. Vegapunk. So far, the arc has been absolutely amazing, and its quality has caught readers off-guard.
Considering Egghead Island is affiliated with the World Government, it was obvious that the arc would have some of the biggest names in the One Piece world. Obviously, not all the characters involved in the arc are blessed with outstanding power. With that in mind, this list will cover the strongest characters in the Egghead Island arc.
8 Jewelry Bonney
Jewelry Bonney is the captain of the Bonney Pirates and the only female member of the Worst Generation. She possesses an unnamed devil fruit that allows her to alter the age of any person that she touches.
On first impression, the ability might not seem particularly eye-catching, but she can potentially incapacitate an opponent by touching them once. Bonney has yet to be involved in a major fight, but her involvement in the Egghead Island arc might change that.
7 Kaku
Originally, Kaku was a member of CP9, but after being bested by the Straw Hats, the entire group was dismissed. Along with Rob Lucci, Kaku was promoted to CP0.
As a masked assassin, Kaku is one of the strongest CP0 members. He is able to use all types of Rokushiki, but he's especially proficient at using Rankyaku. Kaku is also a devil fruit user, but it limits his range of motion, so he has to work extra hard to make it usable. While using his devil fruit, Kaku is able to increase the power and speed of his Rankyaku-based attacks. Kaku has not been engaged in a serious fight yet, but it is plausible to assume that Kaku's strength has increased since the time skip.
6 Seraphim
The Seraphim are different from the other entries on the list in that they do not have a mind of their own. Instead, they take orders from different people. However, it is difficult not to include them as they are incredibly powerful.
The power of the Seraphim was demonstrated when the Marines tried to capture Boa Hancock on Amazon Lily. In order to make up for their lack of strength, the Marines deployed the Seraphim to fight, and they nearly destroyed the island. These monsters are capable of destroying an entire crew of pirates with ease. One of them was even able to force Blackbeard onto the defensive.
5 Jimbei
After several delays, Jimbei officially joined the Straw Hat Pirates in the Wano Country arc. Like the rest of the crew, Jimbei too had an important role to play in the arc. During the raid on Onigashima, Jimbei came face-to-face with Who's Who, a member of the Tobi Roppo.
Many fans expected Who's Who to push Jimbei to the extreme, but the former Shichibukai made short work of his feline opponent. Jimbei's contribution in the arc landed him a bounty of over 1 billion berries.
4 Sanji
Sanji is the cook of the Straw Hat Pirates, and one of the strongest fighters in the crew. As the child of Vinsmoke Judge, Sanji's body was infused with the Lineage Factor of another race. However, it took him a lot of time for him to awaken his latent power.
His power surfaced while fighting against Queen, and it helped him to beat the All-Star comfortably. Sanji's new abilities grant him enhanced speed, strength, and durability. While Sanji may have a lower bounty than Jimbei, there is no doubt that he is still a part of the Monster Trio.
3 Roronoa Zoro
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Roronoa Zoro is a member of the Monster Trio of the Straw Hat Pirates. He joined the crew in East Blue, and since then, he has become an integral part of the crew. Zoro has faced many strong opponents, and they have helped him become a better swordsman.
In the Wano Country arc, Zoro received Enma from Kozuki Hiyori. The legendary sword was wielded by Kozuki Oden, and he used it to scar Kaido. Enma has the ability to draw out the Haki of a person, thus allowing them to land potent attacks on their opponent. After defeating King, Zoro has accumulated a bounty of 1.111 billion berries, which has increased his notoriety further.
2 Rob Lucci
Rob Lucci is an assassin working for CP0. After being defeated by Luffy in the Enies Lobby arc, Lucci was kicked out of CP9. He had to wait quite some time to be reinstated, but instead of joining CP9, he joined CP0. Lucci is a ruthless person, and he is willing to kill anyone who dares to stand in his path.
Lucci is able to use both Busoshoku and Kenbunshoku Haki. He also possesses the Neko Neko no Mi, Model: Leopard, a zoan-type devil fruit. Through rigorous training, Lucci managed to awaken his devil fruit, which bolsters his physical strength further.
1 Monkey D. Luffy
Monkey D. Luffy is undoubtedly the strongest character in the Egghead Island arc. Coming into the arc, Luffy had defeated Kaido, who was one of the Four Emperors. Luffy's fight against Kaido was his toughest to date, and it provided him with very valuable experience.
While observing Kaido, Luffy was able to figure out how to use Conqueror's Haki to coat his body. Luffy also managed to awaken his devil fruit, which he dubbed "Gear 5th." The combination of these powers makes Luffy ridiculously strong. Currently, there is no one on Egghead Island, who can match his power.