Shanks

Shanks is an extremely laid-back man, preferring to take his time by traveling around the world with his crew while enjoying himself as opposed to rushing from one place to another. This was already the case in his youth, where he was playful and innocent compared to the grumpy and opportunistic Buggy, his fellow apprentice. However, he still suffered from occasional bouts of immaturity, starting trivial arguments with Buggy solely out of stubbornness. In many ways, Shanks himself was like Luffy (as a child) in his younger years.

Abilities and Powers

Leadership

According to Brannew, one of Shanks' greatest attributes is his leadership and charisma, having managed to earn the absolute trust and loyalty of the most talented and capable individuals from the four seas and Grand Line all noted for having particularly high bounties and recruited them into his crew. The most prominent are his officers: Benn Beckman of North Blue, Yasopp of East Blue, and Lucky Roux of South Blue. This made Shanks' crew extremely well balanced and impregnable, able to contend equally with the enormous military power of Charlotte Linlin's Big Mom Pirates, Kaidou's Beasts Pirates, and Edward Newgate's Whitebeard Pirates.

Infiltration and Stealth

Shanks is incredibly skilled at infiltration and stealth, as shown when he successfully managed to infiltrate Mary Geoise by wearing only a cloak, a noteworthy feat considering that for most pirates, entering through Mary Geoise without being invited or enslaved is practically considered an impossible and unthinkable feat. He also avoided detection from the many guards and marines present.

Physical Abilities

Shanks is an excellent swimmer, having once swam deep into the ocean depths to save Buggy from drowning. He is pretty fast at swimming as well, able to rescue Luffy in the open ocean from a Sea King attack.

Swordsmanship

As former rival of Dracule Mihawk, the "Strongest Swordsman in the World", Shanks is an immensely skilled master swordsman. Prior to losing his left arm, he competed in ruthless duels on a daily basis with Mihawk.  Even after losing his his arm, Shanks is able to match a blow from Whitebeard which is a testament to his prowess in swordsmanship. He is also powerful enough to easily block Akainu's magma fist using only his sword and Busoshoku Haki.

Haoshoku Haki

Shanks possesses immense mastery in the usage of Haoshoku Haki, a rare type of Haki that only one in several million people in the world can use. It was first hinted sometime after his introduction, before the reveal of Haki, with him intimidating a Sea King with a single glare, causing it to flee for its life. When boarding the Moby Dick, the main ship of Edward Newgate, Shanks was capable of knocking dozens of his men unconscious, many of whom were seasoned men able to survive the New World, while the flagship itself, a ship able to survive the harsh conditions of the New World, was damaged from the sheer force of his presence, impressing those around him.

Busoshoku Haki

Shanks is an immensely skilled user of Busoshoku Haki. During the Summit War of Marineford, his Haki-infused sword easily blocked Akainu's magma-enhanced punch, which was powerful enough to burn enemies such as Ace, Jinbe, and even the Emperor Whitebeard.

Kenbunshoku Haki

Shanks is an immensely skilled user of Kenbunshoku Haki, able to sense a "weird" presence while he was miles outside Wano Country.