Nika, known as the Warrior of Liberation, possesses god-like powers in the One Piece universe. Currently, the individual who holds the esteemed title of Sun God Nika is none other than Luffy, who gained this status after consuming the Hito Hito no Mi, Model: Nika Devil Fruit. This unique fruit allows Luffy to transform into Nika, as demonstrated during his intense battle against Kaido.
As the Warrior of Liberation, Nika is incredibly formidable and can fight with unparalleled freedom. Moreover, Nika brings immense joy and laughter to those around him. However, Nika also has a significant role to fulfill - the discovery of the One Piece and the liberation of the world from the oppressive grasp of the World Government. On his journey, Nika has encountered numerous rivals who stand in his way.
7 Eustass Kid
Eustass Kid, a formidable pirate, carries a staggering bounty of 3 billion berries. Being part of the Worst Generation, Kid is a direct competitor to Luffy in their pursuit of the fabled One Piece treasure. Despite not being the individual that Roger awaits, Kid remains relentless in his quest to lay hands on this extraordinary prize.
Having displayed his strength by clashing with the likes of the Emperors Kaido and Big Mom, Kid suffered defeat at the hands of Shanks. Nonetheless, it is evident that he will continue to play a significant role in the story, even if it is from a more peripheral position.
6 Trafalgar Law
Trafalgar Law, a renowned pirate hailing from the North Blue, is an esteemed member of the Worst Generation. Boasting a staggering bounty of 3 billion berries, Law is universally recognized as one of the most formidable pirates in existence. While he may not directly compete with Luffy, his ultimate goal is to uncover the true significance of the enigmatic "D" and those plagued by an uncertain destiny.
Hence, Law finds himself engaged in a relentless pursuit alongside Luffy, both vying to reach the fabled treasure known as the One Piece before anyone else. This rivalry establishes Law as a formidable adversary to Nika. Unfortunately, Law has currently lagged behind in this race, having suffered defeat at the hands of Blackbeard.
5 Buggy
Buggy currently stands as one of Luffy's foremost adversaries. As one of the newly appointed Yonko following the defeat of Big Mom and Kaido, Buggy boasts an astounding bounty of 3.189 billion berries, surpassing even Luffy's own. Additionally, as the leader of the Cross Guild, Buggy commands both fear and respect on a global scale. Moreover, Buggy harbors ambitions to uncover the One Piece before anyone else, including Luffy, positioning him as a direct rival to the aspiring pirate king.
4 Kaido
Before the Wano arc, Kaido held the title of one of the Four Emperors of the Sea, making him one of the most powerful pirates. Known for his immense strength and formidable presence, he easily overpowered the majority of his rivals. He eagerly awaited the arrival of Nika, anticipating a confrontation to test his abilities. Ultimately, Kaido was defeated by Nika and his current location is unknown. He was once regarded as one of Nika's greatest adversaries.
3 Big Mom
Big Mom, formerly one of the Four Emperors of the Sea alongside Kaido, is an exceptionally formidable pirate. Her power was once unrivaled and she struck fear into the hearts of many. Her bounty stands at an impressive 4.388 billion berries, a testament to her strength.
In the past, Big Mom had a rivalry with Luffy, but ultimately lost to Kid and Law. Currently, her whereabouts are unknown. However, if she is still alive, it is highly likely that she will return and challenge Luffy once more. Though Big Mom may not be his greatest adversary, it was Luffy who played a role in unraveling her hold over the world.
2 Shanks
Shanks, a globally recognized pirate, holds the prestigious title of being one of the Four Emperors of the Sea. Possessing immense power, he holds the highest bounty among the current Yonko, with a staggering amount of 4.0489 billion berries.
Shanks' might is so great that not even Kid could withstand his presence. Additionally, he has set his sights on the One Piece and is determined to claim it as his own. This places him in direct competition with Nika, creating an intriguing dynamic for future developments.
1 Blackbeard
Blackbeard is currently Nika's strongest rival, embodying darkness as opposed to Nika's role as the Sun God. With the powerful combination of the Yami Yami no Mi and the Gura Gura no Mi, Blackbeard poses an immense threat. In the Great Pirate Era, he is undoubtedly one of the greatest challenges Nika will face, alongside Imu and the Five Elders, as he seeks to claim the One Piece for himself.