Question: What weapon does the protagonist of Kingdom Hearts III obtain?

Context articles: Kingdom Hearts χ
Roxas (Kingdom Hearts)
Terra (Kingdom Hearts)
Kingdom Hearts Coded
Kingdom Hearts: Chain of Memories
Aqua (Kingdom Hearts)
Tetsuya Nomura
Kingdom Hearts III
Kingdom Hearts HD 2.8 Final Chapter Prologue
Sora (Kingdom Hearts)

Kingdom Hearts χ (キングダム ハーツ キー , Kingudamu Hātsu Kī ) , stylized as Kingdom Hearts χ[chi], is a Japanese role-playing browser game developed by Square Enix, Disney Interactive and Success Corporation, and published by Square Enix for web browsers as the eighth installment in the "Kingdom Hearts" series.
 Gameplay involves players navigating a customized avatar through Disney-inspired worlds fighting enemies, along with taking down bosses in multiplayer matches in competition with other teams.
 A version of the game for mobile devices, Kingdom Hearts Unchained χ, was released as the ninth installment of the series in Japan in September 2015, in North America in April 2016, and in Europe and Australasia in June 2016.
 In April 2017, "Unchained χ" was rebranded as Kingdom Hearts Union χ[Cross].
Roxas (Japanese: ロクサス , Hepburn: Rokusasu ) is a fictional character from Square Enix's video game franchise "Kingdom Hearts".
 First revealed during the final scenes of the 2004 title "", Roxas is a "Nobody", who was created from the series' main character Sora who briefly loses his heart during the first game of the series. "
Kingdom Hearts II" reveals that Roxas is a member of Organization XIII, a group of Nobodies who need him as he can wield the Keyblade, a weapon that allows him to capture hearts.
 As a member of the organization, Roxas bears the title "Key of Destiny" (めぐりあう鍵 , Meguriau Kagi , lit.
 "Serendipitous Key") .
 He is also the protagonist of the video game "Kingdom Hearts 358/2 Days", which revolves around his origins.
 In the Japanese games, Roxas is voiced by Kōki Uchiyama, while Jesse McCartney takes the role in the English versions.
Terra (Japanese: テラ , Hepburn: Tera ) is a fictional character from Square Enix's video game franchise "Kingdom Hearts", prominently featured in "Kingdom Hearts Birth by Sleep" as one of the game's three playable protagonists.
 He appears in-game as a pupil of Master Eraqus who trains alongside his friends Aqua and Ventus to become a master of the Keyblade weapon.
 Terra's storyline highlights his struggle to tame his inner darkness, a negative attribute that serves as a source of both power and corruption for him.
 Prior to "Birth by Sleep", he had a cameo appearance in a secret ending of "Kingdom Hearts II" and its re-release "Kingdom Hearts II Final Mix"; the later game included an optional boss fight against the Lingering Will (留まりし思念 , Todomarishi Shinen ) , a hollow armor containing Terra's mind.
Kingdom Hearts Coded (Japanese: キングダム ハーツ コーデッド , Hepburn: Kingudamu Hātsu Kōdeddo ) , stylized as Kingdom Hearts coded, is an episodic action role-playing puzzle video game developed and published by Square Enix, in collaboration with Disney Interactive Studios, for mobile phones. "Coded" was a Japan-only release announced at the 2007 Tokyo Game Show.
 Its Nintendo DS remake entitled Kingdom Hearts Re:coded was released in Japan, North America, Europe, and Australia.
 A cinematic remake of the game was included in the "Kingdom Hearts HD 2.5 Remix" video game compilation for the PlayStation 3 and PlayStation 4.
Kingdom Hearts: Chain of Memories (Japanese: キングダム ハーツ チェイン オブ メモリーズ , Hepburn: Kingudamu Hātsu Chein Obu Memorīzu ) is an action role-playing game developed by Jupiter and published by Square Enix in 2004 for the Game Boy Advance.
 The game serves as an intermediary between the two larger-scale PlayStation 2 games in the "Kingdom Hearts" series.
 It was one of the first GBA games to incorporate full motion video (FMV).
 The game was remade into a PlayStation 2 game titled "Kingdom Hearts Re:Chain of Memories", which was released in Japan as a second disc packaged with "Kingdom Hearts II Final Mix" in March 2007.
 The remake was released in North America on December 2, 2008.
Aqua (Japanese: アクア , Hepburn: Akua ) , also known as Master Aqua (マスター・アクア , Masutā Akua ) , is a fictional character from Square Enix's video game franchise "Kingdom Hearts".
 Having first made cameo appearances in "Kingdom Hearts II" and its updated version "Final Mix", Aqua is one of the three protagonists who is introduced in the 2010 prequel "Kingdom Hearts Birth by Sleep".
 She is one of the Keyblade apprentices training under Master Eraqus alongside her friends Terra and Ventus.
 As Eraqus' friend Master Xehanort leaves, Aqua and Terra are assigned to find him and defeat creatures known as the Unversed.
 She also appeared in other "Kingdom Hearts" titles, most notably "Kingdom Hearts HD 2.8 Final Chapter Prologue".
Tetsuya Nomura (野村 哲也 , Nomura Tetsuya , born October 8, 1970) is a Japanese video game artist, designer and director working for Square Enix (formerly Square).
 He designed characters for the "Final Fantasy" series, debuting with "Final Fantasy V" and continuing with various later installments.
 Additionally, Nomura helmed the development of the "Kingdom Hearts" series starting in 2002 and was also the director for the CGI film "".
 He is currently directing "Final Fantasy VII Remake" and "Kingdom Hearts III".
Kingdom Hearts III is an upcoming action role-playing game developed and published by Square Enix for the PlayStation 4 and Xbox One.
 It is the twelfth installment in the "Kingdom Hearts" series, sequel to "Kingdom Hearts II", and the final chapter in the Dark Seeker saga.
 Set after the events of "", returning protagonist Sora is joined by Donald Duck, Goofy, King Mickey and Riku in their search for the seven Guardians of Light and the "Key to Return Hearts" as they attempt to thwart Master Xehanort's plan to bring about a second Keyblade War.
 Their journey has them cross paths with characters, and visit worlds based on different Disney properties and Square Enix's "Final Fantasy" franchise.
Kingdom Hearts HD 2.8 Final Chapter Prologue (キングダム ハーツ HD 2.8 ファイナル チャプター プロローグ , Kingudamu Hātsu HD 2.8 Fainaru Chaputā Purorōgu , stylized Kingdom Hearts HD II.8 Final Chapter Prologue) is a collection of the "Kingdom Hearts" series, developed and published by Square Enix for the PlayStation 4.
 A successor to "Kingdom Hearts HD 2.5 Remix", it was announced in September 2015 and released in January 2017.
Sora (Japanese: ソラ ) is a fictional character and the protagonist of Square Enix's "Kingdom Hearts" video game series.
 Introduced in the first "Kingdom Hearts" game in 2002, Sora is portrayed as a cheerful teenager who lives in the Destiny Islands and has been best friends with Riku and Kairi since childhood.
 When they plan to go on a journey to see other worlds, they are separated by creatures known as the Heartless.
 While fighting against them, Sora obtains a weapon called the Keyblade.
 Donald Duck and Goofy then recruit him in their journey across various worlds to aid King Mickey while Sora searches for his friends.
 Along the way, the trio protects the worlds they visit from various villains.
 In "Kingdom Hearts II", Sora searches for Riku and fights against Organization XIII who, like Ansem the Seeker of Darkness from the first game, are attempting to seize Kingdom Hearts for their own.
 Sora has also made supporting appearances in other games from the series, and reprised his role in manga and light novel adaptations of the games.