TV-Series
Description
Doctor Arinsu is a prominent character from the 2024 anime series Dragon Ball Daima. She is a member of the Glind race, the same divine species as the Supreme Kais, and is specifically identified as the elder sister of the Universe 7 Supreme Kai, Shin, and another brother named Degesu. Unlike her brother Shin, who left the Demon Realm, Arinsu remained, becoming a genius scientist and a major political figure within the Demon Realm's hierarchy, where she once served under the Demon Kings Dabura and later Gomah.

In terms of appearance, Arinsu is a tall, curvaceous humanoid with smooth pale pink skin and sharp indigo eyes. Her most distinctive feature is her long, straight white hair, which is styled into an enormous pompadour. She typically wears a purple dress under a red cape and sports dark purple lipstick and black nails, giving her an elegant yet formidable witch-like aesthetic.

Personality wise, Arinsu is characterized by her immense ambition, sharp intellect, and manipulative nature. From a young age, she was known to be ambitious, choosing to stay in the Demon Realm to pursue power rather than leave like many of her kind. She is sassy, charming, and expressive, often contrasting with her more subdued brothers, but this charm serves as a tool to further her own research and political goals. Despite being a primary antagonist for much of the series, she exhibits a degree of professional patience, acting as a benevolent boss to her underlings and showing restraint rather than cruelty when they fail. She even demonstrates a pragmatic sense of morality, expressing disgust when King Gomah uses the dangerous Evil Third Eye, recognizing the indiscriminate harm it would cause.

Arinsu's primary motivation is to seize control of the Demon Realm and rule as the Supreme Demon King. However, she is pragmatic about her limitations; she lacks confidence in her own raw fighting strength and refuses to take the throne without sufficient power, fearing she would be immediately overthrown. To achieve her goal, she pursues two main avenues of obtaining power. First, she hires a agent named Glorio to bring the Saiyan warrior Goku to the Demon Realm specifically to collect the powerful Demon Realm Dragon Balls, intending to wish for ultimate authority. Second, she seeks to create a powerful new Majin to serve as her enforcer.

Her role in the story is that of a master manipulator and a secondary antagonist who eventually shifts to an ally of convenience. She is the architect of the series' initial conflict, subtly manipulating the new Demon King Gomah into traveling to Earth to use the Dragon Balls to turn Goku and his friends into children, preying on his paranoia that the heroes would invade the Demon Realm. Throughout the narrative, she receives reports from Glorio while she works in secret with the witch Marba, the original creator of Majin Buu. Using a piece of Majin Buu's residue she collected on Earth, her own saliva to create a control link, and a Saibamen seed, she oversees the creation of two new beings: the less powerful but intelligent Majin Kuu and the stronger, more childlike Majin Duu.

Arinsu's key relationships define her arc. She is the sibling of Shin and Degesu, though she stands politically opposed to the latter for much of the story. She employs Glorio as a field agent, but he ultimately betrays her when he uses the Dragon Balls to restore the heroes to their adult forms instead of granting her wish. Her partnership with the ancient witch Marba is crucial, as Marba possesses the magical knowledge to create Majins, while Arinsu provides the strategic direction and genetic material. Her relationship with her creations, Majin Kuu and Majin Duu, is that of a creator and commander, and they remain loyal to her.

Throughout the series, Arinsu develops from a scheming villain into a crucial ally. When Gomah acquires the Evil Third Eye and becomes too dangerous, she recognizes the threat and agrees to a temporary alliance with the Z-Fighters. It is Arinsu who, using a spellbook, discovers the specific weakness of the Evil Third Eye: that the user must be struck three times on the back of the head to have it removed. After Gomah's defeat, her character arc concludes with a nuanced turn. She declines her brother Shin's suggestion that she become the new Demon King, acknowledging that without the Dragon Balls' power, she would lack the strength to hold the position. Instead, she accepts the role of Vice-Supreme Demon King under the newly appointed Majin Kuu, agreeing to use her intelligence and planning abilities to help rebuild the Demon Realm.

Regarding her abilities, Doctor Arinsu is not primarily a frontline fighter but possesses significant power due to her Glind physiology. As a Glind and a former Demon Supreme Kai, she naturally generates godly ki, a superior form of energy that cannot be detected by those who lack the ability to use it themselves. While she generally avoids combat, it is noted that she once defeated a Majin that Marba created, demonstrating that she is more than capable of defending herself when necessary. Her most notable abilities, however, are her intellect and scientific genius, shown through the creation of artificial lifeforms, and her resourcefulness in discovering critical information about magical artifacts.