|Photo Credits by young-street|
He wears a kogatana around his neck, appearing as a golden cross-shaped necklace, and carries his sword Yoru on his back when he is not using it.
At his home in Kuraigana Island's castle, he sports different pants and an open white shirt with a ruffled neck. When he met up with Zoro outside, he had a plain dark cloak draped over his shoulders.
After the timeskip, he shows some more wrinkles near the eyes. While reading about the Straw Hats' actions on Dressrosa and resulting new bounties, he was seen in his casual outfit along with a dark scarf draped over his shoulders and a wide brimmed straw hat.
Twenty four years ago, during Gol D. Roger's execution, Mihawk did not have his beard, nor did he wear his hat, and his hair was scruffier and shorter. He already had his crucifix pendant, and sported what looked like a flower-patterned jacket. Although it cannot be directly seen, he did not seem to be in possession of Yoru at that time.
As a child, Mihawk had many scratches and bruises from training. He used a bokken as his weapon. He dressed in a dark-colored open jacket, short pants, shoes and a light-colored belt.
Like many other characters he has a unique laugh, unusually bearing two: "Wahhahhahha/Kukukuku."
Mihawk is mostly very serious; he rarely smiles, and he has only been seen laughing twice so far. He took the revelation about Luffy being Dragon's son in stride, despite the surprise of those around him. He never unnecessarily reveals emotions on the battlefield, even when something unexpected happens (such as Jozu intercepting his flying slash aimed at Whitebeard, or Luffy surviving his onslaught).
He displays a sense of honor like some other Shichibukai, such as Boa Hancock, Bartholomew Kuma (before his final modification into PX-0), and Jinbe. He recognizes and respects the swordsman's code and he even permitted Roronoa Zoro the luxury of training at his hand for his dedication and selflessness. He is also unafraid to reference his title of "Greatest Swordsman in the World" in relation to himself, indicating a high level of confidence in his own abilities. He takes pride in his swordsmanship, believing that a nick on his sword is a blemish to his pride. Though he is confident in his strength, Mihawk remains grounded. While he has become jaded regarding the abilities of other swordsmen, due to facing numerous weaker opponents, he is able to recognize talent. In fact, he has a desire to see Zoro surpass him after having witnessed Zoro's incredible will and determination after their battle. When he speaks to Zoro, he states he will wait for Zoro, no matter how long it takes and notes that he will continue to be the world's greatest swordsman, showing great confidence in his own skills and abilities.
Mihawk is selective and whimsical when it comes to fulfilling his duties as a Shichibukai, as evidenced by his history of poor attendance at Shichibukai summons, as well as his decision to hunt and harass some pirates over others. Zeff speculated that the reason Mihawk attacked Don Krieg and his men might have simply been because they disturbed his nap. Mihawk admitted that the only reason he followed them all the way back to East Blue from the Grand Line was to kill time.
Although Mihawk spends most of his time alone, he is fine with making company with people, such as Shanks and Perona. He also appears to have a sense of hospitality, having (somewhat) tolerated Perona and Zoro's presence upon his return to Kuraigana Island right after the Whitebeard War; he even went as far as relay to Zoro the events that occurred concerning his captain, Luffy. In addition, he offered a boat to help the Straw Hat's swordsman leave the island.
Mihawk also shows curiosity for the people he decides to attack. He attempted to strike Whitebeard just to see what the power distance between himself and Whitebeard was. He also attacked Luffy just to see if fate is on Luffy's side or not. As a result, Mihawk is very analytical about others' abilities, and can recognize strengths that others may not, such as when he understood that Luffy's natural charisma and quick amassing of comrades is his most dangerous attribute.
Despite his serious demeanor, he is shown to be capable of engaging in peaceful activities such as tilling the land of Kuraigana Island.
Mihawk possesses an immense amount of skill in battle, defeating all but one of Don Krieg's fleet of 50 ships and 5,000 men by himself just before a storm struck. He has also remained unharmed thus far throughout the entire series, despite participating in the Battle of Marineford, in which many of the world's most powerful people suffered injuries. He was also a rival to one of the Yonko, further demonstrating his abilities.
True to his epithet, "Hawk Eyes", Mihawk has exceptional eyesight, able to easily track Luffy's high-speed Gear Second movements, and strike with extreme precision, releasing a long-range slash at him while there was a chaotic battlefront of New World pirates and Marine officers between them.
In addition, he is also a talented teacher: after training Zoro for two years, he accomplished more than the dojo had achieved in the many years Zoro had trained there (though it helped that Zoro's skills were already greatly developed by the time he became Mihawk's disciple). Zoro himself even admitted that even after training with Mihawk during the entirety of the (time-skip), while talking down to Pica, an elite officer of the former Donquixote Pirates, that he (Zoro) is still not anywhere near Mihawk's level of skill with swordsmanship, further attesting to Mihawk's combat and fighting prowess.
Mihawk's strength is so great that Don Krieg accuses him of having the power of a Devil Fruit. While it has not yet been officially confirmed that he does not, it has only been indicated that his abilities are from pure skill and power. This makes Mihawk one of the few known Shichibukai whose strength is based solely on human abilities (Jinbe being a Fishman).
He is shown to have a strong will as he was able to resist Luffy's Haoshoku Haki and be one of the few to still be able fight despite others around him falling unconscious. He also has great mental strength, having not fallen for the charms of Boa Hancock while most men easily fall for the pirate empress' beauty.
Mihawk travels around in a coffin-shaped raft with two green-flamed candles, a single black sail, and a single seat. The fact that he can traverse the unforgiving oceans, as well as the Grand Line itself, in such a meager craft is yet another testament to his abilities.
Although he has never been seen resorting to physical combat outside of swordplay, his fortitude suggests that he naturally possesses superhuman strength and resilience, as he applied tremendous strength behind all of his swings, enough to split battleships and a mountain of ice with ease. He was also able to stop Zoro, a formidable swordsman with enormous strength, with only a single dagger that he held with one hand. He also has extraordinary agility, being able to jump and leap enormous heights and distances. He is quick enough to counter Luffy's Gear Second enhanced speed.
In terms of combat, Mihawk is the single greatest swordsman alive in the world, naturally commenting on his immense mastery of swordsmanship: two years ago, he was capable of effortlessly defeating a three sword-wielding Zoro, who was renowned all over the East Blue, with a single dagger that he generally uses as a dinner knife. He has been known to have frequently dueled with the Yonko Shanks when they were younger.
Mihawk demonstrates immense skill in swordsmanship, especially when using his main sword, Yoru. His range of abilities are extensive, from destroying entire fleets of ships and giant icebergs with immense power to being able to deflect the course of bullets with graceful precision. He is also able to cut through steel with ease and swiftness, as demonstrated with the steel-bodied Mr. 1, whom even Zoro struggled to defeat.