Set in the near future, it tells the story of a teenage girl named Ruby Crescent who wants to become a treasure hunter, following in the footsteps of her father.
He was trained in the wild by a wolf named Zero for a year, and draws fangs on his cheeks in tribute to his master, before being chased away to complete his dream of world domination.[ch.
5, 6] After gaining Ruby and Ball as friends, and training under Kirin, Jio becomes more trustful of people and slowly breaks away from his dream of world domination, choosing to be more helpful and caring of others.
This new outlook quickly gains more friends such as Mr. Wick and Mrs. Vercil, who he sees as his father and mother, never having known his real parents; Jio is emotionally crushed when they are killed by Kujaku in cold blood.[ch.
53] Four years later, Jio has become the leader of the Cyclopian village and his O-Part has again been updated, this time to New Zero-shiki R (零式改R, Rei-shiki Aratame Āru), another boomerang-type weapon that reacts to the amount of hatred in one's heart and changes shape and size accordingly.[ch.
56] After reuniting with Ruby, the Orphan crew then head for Zenom Syndicate HQ where Jio ultimately defeats Amaterasu Miko, who has initiated Armageddon.
76] Ball (ボール, Bōru) is a thirteen-year-old boy with dreadlocks living in the Stea Government-oppressed Entotsu City with his ill parents and younger sister.
76] Cross Biancina (クロス・ビアンキーナ, Kurosu Biankīna) is the fourteen-year-old, religious commander-in-chief of the Stea Government's SS rank O-Part airship, Shin.[1][ch.
52] After the four year timeskip, Cross has left the Stea Government and is traveling with the rest of the Orphan Crew helping them look for Jio.[ch.
15] Kirin meets up with Jio, Ruby, and Ball again at the Dastom Ruins, where they encounter his twin brother Kujaku, before continuing to travel as a quartet.[ch.
33, 53] His O-Part is the Sardine Sword (with Sesame) (ママカリの剣(ゴマ付き), Mamakari no Ken (Goma-tsuki)), which paralyzes the people it cuts with its stench and was the idea of Papuwa of the South Seas and Jibaku-kun author Ami Shibata.[ch.
34] Four years after Rock Bird, Futomomo-taro and Jin are still traveling together and accidentally end up in Zenom HQ at the same time as Jio and company.[ch.
60, 61] During the attack on Stea HQ, Miko acquires Jio's half of the Legendary O-Part and then uses Shin to take over the body of Balsa to form a group composed of those on board, including Ponzu.[ch.
30] Nicknamed "Cross-Scarred Dofwa" (十字キズのドワフ・ロンギヌス, Jūji Kizu no Dowafu Ronginusu), after the shape of the scar covering his eyes, he is the former commander of the attack force.[ch.
58] Mishima Kagehisa (三島 影久) is a lieutenant general in the Stea Government Army and their chief strategic officer of the Northern Hemisphere.[ch.
28] He is in charge of their operations at the North Pole, which mainly consists of research surrounding the Kaballah and the Angels, and is privy to information about them that even Dofwa is not.[ch.
61] Ponzu (ぽんず) is a legendary hacker, nicknamed "Invisible" (インビジブル, Inbijiburu), whose skills the Stea Government values enough to cut a deal with and house the wanted criminal in secret.[ch.
30] She wears a skimpy outfit with a built-in computer, a hat with cat ears and a tail that acts as a local area network cable.[ch.
After Cross defected from Stea post timeskip, Balsa took his place as commander of Shin and declared it an independent state called Zipan (ジパン, Jipan).[ch.
68] Later as the non-Angel and Demon members of the Orphan crew are being absorbed by Miko and Shin, Kujaku uses the sword to perform the ultimate technique their father taught them to save them, before dying on his feet smiling.[ch.
66] Rock was formerly in the Stea Government, but after learning that what he believed to have been a mission to suppress an uprising, was actually simply to acquire an "O-Part" and eliminate anyone who knew about it, he left them.
He also carries the O-Part 12 Watchers (12の監視, Tuerupu Wotchā) on his back, which are twelve pyramid-shaped pieces he controls that each emit laser beams and can intensify their power when combined into certain formations.
69] When she holds the ring O-Part Fairing (フェアリング, Fearingu), which is worn around her neck like a necklace, to her mouth, her personality changes completely as she angrily yells at them.
69] Franken is able to spin very rapidly, destroying objects, and shoot masks out of his mouth that fit onto people's faces and take control of their body.
40, 41] His O-Part is Wraith (レイス, Reisu), sharpened chains he can control with frost Effects, that were found at the scene of his parents' death.[ch.
62, 66] Wise Yury (ワイズ・ユーリィ, Waizu Yūrii), nicknamed the "Crimson Magician" (深紅の奇術師, Shinku no Kijutsushi), is a low-ranking official of the Zenom Syndicate.[ch.
Yuria (ユリア) is a short teenage girl who wears a cape and enters the Olympia with Kite in hopes that the prize, the Legendary O-Part, can cure her.
38] In her fight with Python Jack, she is forced to unleash Lucifuge to win and the Demon is about to rampage the arena until Yuria's love of Kite subdues it.[ch.
She tries to win at any cost in order to reunite with Mars (マルス, Marusu, alternately "Malse"), the man she loved and who won the Olympia tournament four years prior but never returned.[ch.
He fights using Viraia (ビライヤ, Biraiya), a living O-Part that possesses high speed movement and acid attacks, but occasionally tries to kill its user.[ch.