Ryu Miyazoto

Ryu Miyazoto is one of the main antagonists of the entire series, being the archenemy of Kanon Seto and is the secondary antagonist for both series. He was the right-hand man of Don Hector Bolsa and a legendary cartel enforcer who ultimately survived his battle with Kanon on the Armageddi Islands and later became the chief lieutenant of Don Rupert Marshal with the promise of revenge against Kanon. He is also the brother of Moanna of the Jivata Tribe.

Personality
Ryu Miyazoto is a reckless, violent, sadistic, brutal, unpredictable, cynical, Machiavellian, psychopathic, insane, extremely prideful, and a remorseless killer with a dark sense of humor and a frighteningly murderous nature who is feared by even his own underlings and superiors alike, some of whom are as chaotic and psychotic as Ryu.

Despite being crazier and more mentally unstable than the other cartel leaders, Ryu is a charismatic and masculine leader who uses psychological torture to keep his men in line and earn their loyalty through both fear and allowing them to do mostly as they please. Ryu is very capable of and immensely enjoys torturing his victims, sometimes keeping his victims alive for a long time before killing them. Ryu also possesses high intelligence and can be manipulative. Despite torturing and killing many people, he very rarely shows remorse towards a few select victims.

Ryu's most notable relationship is with his archenemy Kanon and he became obsessed with him upon meeting him for the first time, believing he is the closest thing to a friend he ever had and enjoys the battles they have together because he prefers his kills to be a challenge rather than easy prey, saying that his life was pretty boring until he met Kanon. Ryu's sister is Moanna and Ryu admitted he loved his sister enough to kill someone for her, though their relationship was severed tragically when Ryu was recruited into the cartel instead of remaining at the Jivata Tribe, ultimately betraying his sister. Ryu though believes that Moanna was the one who betrayed him and now hates her for it to the point of being willing to kill her. Ryu believes that Moanna is one of the reasons why he's so mentally unstable.

Background
Ryu Miyazoto was born in 1985 on the Armageddi Islands and from a young age, he was a member of the native Jivata Tribe. He was particularly close to his sister Moanna and his first kill was to protect her. Throughout his early life, Ryu felt undervalued, unappreciated and mistreated by the tribe in favour of his sister, which slowly grew into hatred and anger for both Moanna and the Jivata Tribe, despite everything he had done for them.

A cartel Don, Hector Bolsa, eventually came to the islands to make it his primary base of operations and went to war with the local tribe. As part of Hector's strategy to defeat the tribe, he spread his meth operations into the tribe's territory and managed to hook some of the members up. Due to this, the Jivata Tribe formed a plan to assassinate Hector and put a stop to his operations. The plan though failed and ended up with Ryu getting captured by Hector's men, forcing Moanna and the other warriors to abandon him though Moanna wanted to save her brother. During his time as his captive, Hector provided Ryu with meth and he became addicted, and Hector found potential in Ryu so he decided to torture him into folding over to his regime. Ryu eventually swore his loyalty to Hector and was promoted to his second-in-command, though it wasn't the torture that broke him, it was the fact that Moanna never came back for him and dubbed her as a traitor that he didn't see as family anymore, along with the Jivata Tribe whom he came to despise greatly. Ryu went on to become a fierce enforcer of Hector who led his thugs into raping, pillaging, stealing and murdering throughout the islands.

Ryu and his men would help Hector with his business such as growing marijuana fields and kidnapping and selling inhabitants of the island into slavery and strike terror and injustice in Jivata and the islands that are rightfully theirs. Ryu would operate from a hidden fortress in the North Island from where he would oversee the deaths and destruction he caused on the natives and the people who were once considered his family. During one of his missions to destroy a village and slaughtering the natives, Ryu discovered two young twin girls named Yikiko and Riho Yoshi and, instead of killing them, he surprisingly kept them alive and brought them back with him. Ryu trained them from their childhood and raised them to become assassins of the cartel. At some point, Yushiro Shibata and his friends came to the Armageddi Islands during a bachelor party though they ended up being captured by Ryu and his men. Yushiro however managed to escape though was forced to leave his friends behind, leaving to Ryu either killing them or selling them into slavery. Ryu attempted to hunt down Yushiro but could never find him and marked him as an enemy to the cartel, offering a reward for the man who manages to kill Yushiro and an even bigger reward for bringing him back alive.

First Series
During Kanon Seto and his friends' holiday, they hear about an island where they can do whatever they want from Sebastian Garcia, the strip club manager that works as a spotter for Hector and Ryu. They then decided to do a blind skydive over the Armageddi Islands. After landing, they are soon captured by Ryu and his men. However, one of Kanon's friends, Okyoito Tamai, starts mouthing off to Ryu and attempts to stand up for himself and his friends despite them trying to calm him down. Ryu though tells them to shut up and let Tamai keep talking before pulling out his machete and holding it to his throat, demanding he continues. Tamai however tries to apologize to Ryu but Ryu is disappointed that Tamai actually backed down upon being intimidated and plunges his machete into his stomach, murdering him, and then hangs his corpse up on a tree. Ryu threatens Kanon and his friends and has them divided into groups.

While Kanon, his older brother Motoichi and Motoichi's girlfriend Hiraki Kemei are tied up and gagged in a cage, Ryu explains how he is going to ransom them for large amounts of money from their parents. It is revealed later that even after receiving the money, Ryu will sell them as slaves for increased profit. After they manage to escape their confines and brew up a plan to get everyone off the island, they encounter Ryu yet again as they witness from a distance execute several hostages who couldn't be sold off. Ryu taunts a particular prisoner and uses another man's gun instead of his own to execute him, saying that he isn't even worthy to be killed with his personal weapon. Ryu is then informed by another henchman that Kanon and the others have escaped, resulting in Ryu raging at the man before punching him to the ground and ordering his men to search for them in a mental breakdown.

The three escape the prison camp and use the map they took to try to lay out an escape plan however they argue on what to do, but are interrupted when Ryu unexpectedly ambushes and shoots Motoichi in the neck, the latter of whom bleeds to death. Kanon fails at saving his brother from bleeding out and is frozen in complete shock, despite Ryu shouting at him to flee so he can find the joy of hunting him. Hiraki manages to wake up Kanon and the two flee into the forest while Ryu sends his henchmen to hunt them down, separating the two. Ryu then summons Yikiko and Riho, whom he sends after Kanon and Hiraki.

Despite Kanon managing to escape to the Jivata Tribe, it is revealed that Ryu managed to recapture Hiraki and had shot her in the leg. Ryu is shown torturing Hiraki by pushing in her gunshot wound while she is chained and gagged, but is suddenly interrupted when one of his henchmen. While Ryu was initially angry at his goon, he is informed that Hector wants to talk and Ryu answers the call. Hector chastises Ryu for not taking matters seriously with Kanon and urges him to take care of him. Ryu obediently claims he will and starts cooking up a plan to lure Kanon into a trap, ordering one of his men to fetch him Kanon's girlfriend, Shina Nishida.