Leon

Leon is a supporting character in the Kingdom Hearts series and leader of both the Heartless Resistance and the Hollow Bastion Restoration Committee. Originally he went by the name Squall Leonhart but due to his world being destroyed by the Heartless he changed his name in an attempt to amend for his mistakes.

Squall was the main character of Final Fantasy VIII and wields the notorious Gunblade.

Kingdom Hearts
''A swordsman who wields the Gunblade. His real name: Squall Leonhart. He escaped to Traverse Town when the Heartless raided his home world. To part with his old self, a man who had been helpless to stop them, he changed his name. Since meeting the king, who has been so vigilant against the Heartless, Leon has sought the truth behind the "key".''

"Final Fantasy VIII"

Kingdom Hearts: Chain of Memories
''A cool and collected swordsman who wields a gunblade. His real name: Squall Leonhart.''

Leon once fought with Sora against the Heartless, but the Leon we met in Castle Oblivion is a product of Sora's memory, so he can't remember much of what happened before.

Kingdom Hearts II
Final Fantasy VIII

''A swordsman who carries a gunblade. His real name is Squall Leonhart. He took the name Leon to distance himself from his past self -- the man who stood helpless as Heartless invaded his home.''

''For some time he took refuge in a different town, but thanks in part to Sora's help, Leon was able to reclaim this, his hometown. Now he works tirelessly towards its restoration.''

Early Life
Squall Leonhart grew up in the paradise world of Radiant Garden until it was consumed by darkness. Ashamed and angry that he was unable to defend his home and his loved ones from the Heartless, Squall assumed the name of Leon in order to distance himself from his past, vowing never to use his real name until the Heartless are defeated and his world restored.

One of the few survivors from Radiant Garden, Leon awakened in Traverse Town along with fellow Radiant Garden refugees Yuffie, Aerith and Cid. During his teenage years, Leon formed the Resistance against the Heartless, effectively keeping an area of Traverse Town safe against Maleficent and the growing tide of Heartless. He was also known to travel between Worlds in his gummi ship, assisting other refugees in peril and relocate them to Traverse Town. His actions did not go unnoticed, eventually gaining the attention and confidence of King Mickey who was watching the growing battle warily.

9 Years Later
Nine years after Radiant Garden's fall, which is now re-named as Hollow Bastion, when the Wielder of the Keyblade was revealed King Mickey ordered Goofy and Donald to find Leon, trusting that Leon would inform them of the circumstance and help them find the Wielder, Sora. It turned out however that Leon had already found Sora within the safe First District of Traverse Town, challenging and either defeating the boy in a duel or being defeated before dragging Sora back to the resistance's hideout; a room in one of Traverse Town's motels. There Leon and Yuffie explained to Sora about the Heartless and his destiny as the Keyblade's chosen one. Uniting Sora with newly arrived Donald and Goofy, Leon then sent them on their way.

When Sora, Donald and Goofy returned to Traverse Town again seeking Leon's help they find him in the Secret Waterway underneath Merlin's house training. Here he offers information about the Keyholes of each World that lead to the heart of the World. He explains that the Heartless are drawn to the heart's power and would corrupt it, thus causing the world to disappear; which is why Sora's Keyblade is so important, because it has the power to seal them from the Heartless.

Leon also gives Sora the Earthshine Gem which contained the spirit of Simba, for luck. Later after they move to the newly accommodated base; a previously abandoned house deep in Heartless territory, Leon and co. tells Sora about Maleficent and about Ansem and his journal before once again seeing Sora, Donald and Goofy off.

He also gives Geppetto and Pinocchio a place to live after they escape from Monstro.

Escaping to Traverse Town from Hollow Bastion Sora, Donald, Goofy and Kairi sought shelter with Leon's group. Sora informed Leon of everything that had happened prompting him to follow Sora and co. when they left for the final battle with Maleficent in Hollow Bastion.

After Sora defeats the Behemoth Heartless that guards Hollow Bastion's keyhole, Leon stands outside waiting to bid their farewells for after Sora seals the heart of all Worlds: Kingdom Hearts, the two groups may never see each other again.

Later Leon, Yuffie and Aerith can be seen wandering the Hollow Bastion Library, reading the books. Leon gives Sora the remaining pieces of Ansem's Report expressing his disappointment in the man.

After Sora sealed Kingdom Hearts and returned the universe to its order, Leon, Yuffie and Aerith are reunited with Cid and Cloud in Hollow Bastion.

Kingdom Hearts: Chain of Memories
After the defeat of Ansem, while skirmishing through Castle Oblivion Sora, Donald and Goofy later meet Leon and his friends in a memory-based version of Traverse Town. However, like the town itself, little did Sora and his party realize that Leon and his friends were actually the product of Sora's memories that were being manipulated by Naminé. Due to that, the Leon and his friends that Sora encounter have no memories of ever meeting Sora, but somehow they know his name which they could not explain how. Like the Leon from the first game, he nonetheless decides to help Sora and co., such as by teaching Sora the card-based system as well as providing the Simba and the Key of Guidance cards in order for Sora to proceed. Before Sora leaves, Leon ensures him that he'll be okay, no matter what shape reality takes, and that while he may not remember Sora, he knows that he is in his heart.

Kingdom Hearts II
In Kingdom Hearts II, Leon is seen to be slightly more cheerful than he was in the original Kingdom Hearts, as he and others are rebuilding their home with Leon being the leader of the "Hollow Bastion Restoration Committee," which is composed of the returning Final Fantasy cameos from the first Kingdom Hearts and of Merlin. He actually fights alongside Sora in one of the fights near the beginning of the game. Sleeping Lion, a Keyblade in Kingdom Hearts II, is another reference to Squall. He also, along with many other characters, including Tifa and Cloud, help Sora fight the Heartless on the Ravine Trail in the Hollow Bastion (later named Radiant Garden). Leon also plays the largest role for any Final Fantasy character in Kingdom Hearts II storywise, the only Final Fantasy character that has relations to King Mickey, and works very close to Sora and company. Leon is also the only Final Fantasy character in the game to come face to face with the Organization and fight the Nobodies. He seems to be a good friend to both Cloud and Aerith.

Appearance and Personality
Leon's physical appearance consist of shoulder-length brown hair and blue eyes. A scar runs diagonally across the bridge of his nose. He wears a short leather jacket with small red wings on the back, as well as the red Griever symbol on the left sleeve. He also wears a silver pendant with the Griever symbol. In Kingdom Hearts II, his jacket has fur along the collar.

When Sora first meets Leon, his personality is that of a withdrawn and quiet loner. Eventually he opens up to become a more caring person, as seen as when he is worrying about Sora, Donald and Goofy's safety in the aftermath of the 1000 Heartless battle in Hollow Bastion. Although appearing as sullen and brooding in Kingdom Hearts, after returning home to Hollow Bastion in Kingdom Hearts II he seems to be more cheerful and is seen to be smiling more often. Leon has also good leadership qualities which he displays throughout in both games, mirroring the character development of the original Squall of Final Fantasy VIII, who himself began as a brooding and unconcerned loner but eventually became a caring friend and leader thanks to his friends.

Origin
Leon was originally Squall, the main protagonist from Final Fantasy VIII, a console role-playing game that was developed and published by [http://en.wikipedia.org/wiki/Square_Co. Square] (now Square Enix) for Sony's PlayStation. It was released in Japan on February 11, 1999, and North America on September 9, 1999.

Trivia

 * In the ending credits of Kingdom Hearts II, Leon receives a letter, most likely from Rinoa due to the winged insignia emerging from said letter. Whether this is a mere reference or that an incarnation of Rinoa exists in the Kingdom Hearts universe is unclear.
 * Leon is the only character that has been confirmed to have canonically beaten Sora besides Riku. He appears as a boss early in Kingdom Hearts; although he's beatable, Sora appears to lose the fight regardless of the outcome (this makes the fight a "scripted encounter" that the player is supposed to lose). If the player "wins" the fight, Sora will receive experience points that he will not receive if he is defeated in battle. However, if Sora does win, he simply passes out from what appears to be exhaustion, so Leon doesn't technically defeat him.
 * Of all Final Fantasy characters to appear in the series, Leon (alongside Yuffie) is the one most involved in the main storyline such as his active participation against Organization XIII and the Heartless.
 * Leon is the only Final Fantasy character to be called by a name other than his original name in the Kingdom Hearts series, although the reason for this is explained in the series. He shares his pseudonym with the English name of Final Fantasy II character Leon, whose original Japanese name is shared with Squall's surname, namely Leonhart.
 * Leon has shown to be able to wield a Keyblade for a short time. This may be an error, however.
 * Leon's Blasting Zone is the only one of his four Limit Breaks to make an appearance and is significantly downplayed than the original Blasting Zone, which, animation-wise, extended beyond the atmosphere. Leon's merely magically increases his blade's size. This is carried over to Squall's appearance in Dissidia Final Fantasy but in a much shorter duration.
 * As in the case of the Japanese voice actors of the Final Fantasy VII characters in the Kingdom Hearts series, who were carried over to voice their respective character's original incarnations, Leon's voice actor, Hideo Ishikawa, was recruited to voice the original Squall Leonhart in Dissidia Final Fantasy and is presumably the official voice actor of any incarnation of Squall.
 * In Kingdom Hearts Leon says 'Don't act as if you were sad.' Sephiroth says this to Cloud after killing Aerith in Final Fantasy VII.

Léon