TV-Series
Description
Kyousuke Arasaki stands as the primary antagonist of the Crash B-Daman anime and the secondary antagonist in the manga. He commands the Revolver-Type B-Daman Omega Bahamut and a Rush-Type variant called Alpha Bahamut; these two powerful weapons can unite to form Ultimate Bahamut.

He possesses a tall, slender frame, wild turquoise blue hair, and striking cat-like orange eyes with sharp pupils. His eyes, once more vibrant in his youth, narrowed into a sinister gaze over time. His attire consists of a red long-sleeved leather jacket with an orange collar, a yellow shirt with a torn hem, fingerless gloves, dark blue pants with torn ankles, and matching shoes. Adornments include small round green earrings, a diamond-shaped necklace holding a green gem, a light brown choker, and five red belts with gold buckles on each ankle. Bandages wrap around his head, kept as a memento of his deceased father. While commanding troops outside the Saionji Building, he often wears a lapel.

His demeanor is marked by maniacal laughter, a volatile ego, and an intimidating voice. He exhibits intense bloodlust, delighting in the prospect of killing B-Ders or watching them die, such as when he laughed at finalists eliminating each other in the World Crash Grand Prix. He is directly responsible for multiple deaths. Yet, he was once a devoted son. His father’s death shattered his sanity, breeding a nihilistic obsession with world conquest or annihilation. Deceptive and silver-tongued, he smoothly earns trust, as seen with the Saionji family and investors, though he heeds his father’s warning to trust no one. He treats all as disposable pawns, ordering executions for those who outlive their usefulness, like Ikki Kida and Sabu Nishijima. He also harbors profound jealousy toward Hitto Tamaga, partly because Hitto’s father still lives, leading him to kidnap and imprison Dr. Tamaga.

In the anime, he acts as personal secretary to Kurando Saionji, president of Saionji Konzern, strategizing and commanding company troops. His background reveals his father held a grudge against Saionji Konzern for their mistreatment, advising Kyousuke to trust no one and pursue world domination. After his father’s death, Kyousuke buried those memories and dedicated himself to global conquest. He eventually betrays the Saionji family and seizes control as the new president. His schemes involve developing war weapons and manipulating events like the World Crash Grand Prix to eliminate skilled B-Ders. He acquires Omega Bahamut in episode 40 and Alpha Bahamut in episode 43. Defeated by Hitto in a final battle, he falls into an explosion, only to reappear momentarily, vowing he will not lose next time before vanishing.

In the manga, Kyousuke is the eldest of the eight successors of the Evil Gods organization, bearing an Evil Gods crest on his forehead. He displays a harsh nature, frequently bullying Teruma Kamioka and Kodoh Kuraki, whom he mockingly calls "Kodoh-chan." His fierce ambition to become the successor of Tycoon Shō leads him to deride Hitto as "that toy." It is revealed that he is Shō’s second experiment to create a powerful B-Der. During a clash with Hitto, he is hurled into the sky and plunges into the sea. As the Evil Gods castle crumbles, he clings to driftwood, reaches shore, and swears revenge on Hitto and Shō.

Kyousuke is distinguished by dual-wielding B-Daman, a trait shared only with Kodoh Kuraki. He typically employs light orange marbles for his Bahamut B-Daman and attached Synchro Weapons. The characters in his surname, Arasaki, mean "the coast laid to waste," and his given name, Kyousuke, can signify "big assistance," together reflecting his role as a major force of destruction.