Buddy Complex(バディ・コンプレックス,Badi Konpurekkusu?) is a Japanese mecha anime television series produced by Sunrise. The series aired between January 5, 2014 and March 30, 2014. The first episode was pre-aired on December 29, 2013. A manga adaptation began serialization in ASCII Media Works' Dengeki Daioh from January 27, 2014. A 2-part sequel aired on September 29 and 30, 2014.
Buddy Complex revolves around the main character, Aoba Watase, an ordinary high school boy. He lived an average, everyday life commuting to high school in the city. On the first day back after summer break, Aoba is attacked by a giant robot that appears out of the sky. As he's pursued through the city, his classmate Hina Yumihara appears in a giant robot of her own. She rescues him, and tells him cryptically that "Dio is waiting," before she sends Aoba into the future and then disappears. When Aoba wakes up, he finds himself over seventy years into the future, where the Free Pact Alliance and the Zogilia Republic are at war with each other, and there he meets a young pilot named Dio Jyunyou Weinberg. This begins Aoba's new life as a pilot of the Free Pact Alliance, and together with Dio, they would change the fate of the world.
The main protagonist. 16-year-old. First year student at Seio High School. Aoba is a bright, considerate young man. He excels at athletics, especially basketball. He was an ordinary Japanese high school student from 2014 who got transported into the year 2088 and now fights for the Free Pact Alliance. He is the pilot of the Coupling Valiancer Luxon, and later Luxon Next. He has exceptional compatibility as a Coupler. He was surprised to see Hina as the Zogilia pilot with no memories of him from the past and even tries to kill him when he offered his hand to her to come into Luxon's cockpit. Despite knowing that Hina was the enemy, Aoba doesn't want to fight her because she is the girl who saved his life. After another encounter with Hina and he talked with her, Aoba was almost convinced she was not the same Hina as the Hina Yumihara who saved him. But he doesn't seem to care about it anymore, when he invites Hina to join the Cygnus after her father's death, even though his effort to bring Hina to his side is ruined by Bizon. Later, he realizes she is indeed the same Hina who saved his life and he decides to save her from her fate.
Dio Jyunyou Weinberg (隼鷹・ディオ・ウェインバーグ,Jun'yō Dio Weinbāgu?)
An ace pilot for the Free Pact Alliance. 16-year-old. He is the pilot of Coupling Valiancer Bradyon and later Bradyon Next. He's calm and stoic, but he has a strong sense of justice in his heart. He usually looks down on Aoba. After he saw the images of Aoba's memories during Coupling using the old Valiancers, he starts to believe Aoba and helps him to get through Hina and saves her.
Hina Yumihara (弓原 雛,Yumihara Hina?)/ Hina Ryazan (ヒナ・リャザン,Hina Ryazan?)
The main heroine. 16-year-old. First year student at Seio High School. Hina Yumihara is Aoba's classmate who ends up next to him in class following seat changes after the break and seems to have feelings for him. She keeps acting cold, stiff, and formal toward Aoba that makes Aoba thinks he did something to her. She is actually a mecha pilot from the future who has a mission to protect Aoba from opposing mecha from same future with her who wants to kill him. She sent Aoba into the future, where she had not yet met Aoba and served as a pilot of Zogilia Republic, enemy of the Free Pact Alliance. In Zogilia, Hina is the daughter of veteran Lieutenant Commander of Zogilian military, Viktor Ryazan. She was assigned to Alfried's squad as the pilot of the Fortuna but later transferred to Zogilia's Adminburo as the pilot of Coupling Valiancer Karura. During her first encounter with Aoba, she's confused an enemy pilot knew her name. She even tries to kill him when he offered his hand to her to come into Luxon's cockpit. She's intrigued by Aoba's kindness after he saved her when they were stranded together on deserted island even though they are each other's enemy soldier and he also gave her the pink cat hairpin that belongs to Hina Yumihara. But, it caused her childhood friend Bizon who is in love with her to scold her and despises Aoba.
Free Pact Alliance
The Free Pact Alliance, formally called the Confederate Treaty of Liberty (自由条約連合,Jiyū Jōyaku Rengō?), is a long-standing alliance between Japan and North American and Western European countries to counter the advance of the Zogilia Republic.
A scientist in charge of the Coupling System. Developed the specialized cockpit that is used in Luxon and Braydon. She was an apprentice of Alessandro Fermi and is an extremely skilled researcher. Her personality is bright and active. She seems to be in a relationship with Lee Conrad.
Cygnus's bridge crew member and Elvira Hill's aid but practical matters are left in her care. She's honest and straightforward, but a bit shy. She was one of the first people to interact with Aoba upon his arrival to the Cygnus. She seems to have feelings for Aoba and worries that if given the chance Aoba would leave them and return to his own time period.
Mishima was introduced in Buddy Complex Kanketsu-hen as extra pilot of Cygnus's valiancer unit. He admired Aoba as a fellow Japanese and a Coupler. He was the pilot of one of the Alliance's valiancers that have been wiped out by second Gorgon.
Fiona is the younger sister of Dio. She is 12-year-old. She was injured in a Zogilia attack that took the life of her mother prior to the events of the series. As a result she is confined to a wheelchair. She deeply cares about her brother's well-being and hopes that one day he and their father will reconcile.
Rear Admiral and 1st Navy Special Squadron Commander of Free Pact Alliance's military. He believes Coupling System will become a force to overturn the war.
Zogilia Republic, formally called Republic of Great Zogilia (大ゾギリア共和国,Dai Zogiria Kyōwakoku?) is a small nation that quickly grew into a superpower by conquering neighboring countries and expanding its territory along mainland Asia, Russia, Eastern Europe, and Scandinavia.
Captain of Trident and later Vajra. Pilot of Alsiel. He is a Commander assigned to 501st Mobile Company, 193 U-boat Brigade. He possesses great skill in strategic commands in addition to his clever Valiancer piloting skills.
Member of Alfried's squad but later transferred to Zogilia's Adminburo together with Hina. Bizon is 20-year-old. He is childhood friend of Hina. He is a honest soldier born to a prominent family. He's well trusted by Alfried and often given charge of the front lines. He is the pilot of Nebiros and later Coupling Valiancer Nergal. He is in love with Hina to a point that can be considered borderline obsession. He despises Aoba for trying to rescue Hina during a battle because it caused her to be put under suspicion of being a traitor but then later his hatred toward Aoba grows because of jealousy that Aoba intrigued Hina. An aged Bizon appears in the future, seeming to have survived Dio and Aoba's assault, looking far older, implying he stayed in the past and seems to be in a very influential position in Zogilia's army. He still holds a grudge against Aoba.
Hina's father. He found Hina in Zagreb ten years ago then took her as war orphan and raised her as his own daughter. He is a Lieutenant Commander of Zogilian military assigned to 101st Independent Reconnaissance Brigade. During the infiltration of the Alliance's Hawaiian base, Viktor was shot and managed to tell Hina about him adopted her before he passed away.
1st Airborne Division Commander, Protection Division of Zogilia Adminburo. He is Captain of Gae Bulg. He's first thwarted by Dio using Beryl Explorer and later killed by Aoba and Dio using Luxon and Bradyon.
Ryutaro is Aoba's best friend and classmate at Seio High School. He and Aoba were both on basketball club in middle school but he ended up getting injured. Aoba attends the same high school with him because it's close to the hospital where Ryutaro gets his physical therapy.
Junichi is Aoba's friend and classmate at Seio High School. He, Aoba, and Ryutaro play basketball together after school.
Sunrise filed for a trademark on the use of the words "Buddy Complex" in a logo on October 1, 2013. Despite making the trademark for a host of media items, the company had yet to announce any plans for the project. This changed on December 1, 2013 when the company unveiled a website in an announcement that they were developing the "traditional robot action" series, Buddy Complex.
The anime series is produced by Sunrise in collaboration with Bandai Visual, Bandai Channel, Lantis, Banpresto, and Bandai Namco Games under Bandai Namco Holdings. It is an original creation of Hajime Yatate and is directed by Yasuhiro Tanabe, with series composition by BC Project. The series features character designs and animation direction by Asako Inayoshi and Tomoshige Inayoshi and music by Tatsuya Katou. The first episode received an advanced pre-broadcast on Tokyo MX on December 29, 2013. Following episodes premiered on Tokyo MX on January 5, 2014 with later airings on YTV, TVA, BS11 and Bandai Channel. The opening theme is "Unisonia" by Miho Karasawa under the name True while the ending theme is "Ano Sora ni Kaeru Mirai de" (あの空に帰る未来で?) by ChouCho. Funimation streamed the series on their video website, beginning on January 6, 2014.Daisuki will stream the episodes worldwide on their Website as well as on their official YouTube Channel. The series aired 13 episodes which ended on March 30, 2014, however its story is scheduled to continue in the future.Bandai Visual will begin releasing the series in Japan on Blu-ray volumes starting on March 26, 2014.
A 2-part sequel titled "Buddy Complex Final Chapter: In the Future When We Return to Those Skies" (バディ・コンプレックス 完結編 ―あの空に還る未来で―,Badi Konpurekkusu Kanketsu-hen: Ano Sora ni Kaeru Mirai de?) aired on September 29 and 30, 2014. The insert song "Twin Bird" performed by True. 
A free-to-play multi-player smartphone game titled "Buddy Complex: Coupling of Battlefield" (バディ・コンプレックス 戦場のカップリング,Badi Konpurekkusu: Senjō no Kappuringu?) released by Bandai Namco Games for iOS and Android devices in Japan on March 7, 2014 with theme song "Orbital Line" by Erica Masaki.