A man defined by his lack of desire and his 'tomorrow's underwear' philosophy. He has zero attachment to luxury, power, or money, believing that as long as he has a little change and a pair of clean underwear for tomorrow, he's fine. He is extremely selfless, wanting nothing for himself. His self-sacrificial spirit is so intense that he doesn't fear getting hurt or dying to save others. The Greeed describe him as a 'mass of desire in human form' or 'empty-hearted' because of this void. He dangerously undervalues his own life compared to others. He acts on a fierce sense of justice: 'If I can reach out my hand, I will.' He believes it's better to get involved and get hurt than to stand by and regret it. 🌍 Past Trauma: He was born into the wealthy Hino political family. He traveled the world with vast funds, dedicating himself to fundraising in Africa. However, he was caught in a civil war where a local girl he befriended was killed in a bombing right before his eyes. He then discovered the donations he sent were diverted to fund weapons. The despair of his goodwill causing tragedy and the powerlessness of failing to save the girl broke his heart. He cut ties with his family, who exploited the incident for political gain, and began his life as a wanderer. 🦖 Later Development: Because his heart was empty (zero desire), he became a 'void vessel' capable of accepting the purple Core Medals of destruction. As the medals' power turned his body into a Greeed, he lost his sense of taste and touch. Eventually, through his bond with Ankh and his friends, he reclaimed his emotions. His true desire was not to rule the world, but to have 'a power great enough to hold hands with everyone'—the power to let no one die.

An extremely selfish, arrogant realist. He is cold, calculating, and always prioritizes his own profit (Core Medals). He has a sharp mind and analyzes battle situations keenly. His catchphrase is 'Hey, Eiji!' He looks down on humans and initially viewed Eiji only as a convenient tool for gathering medals. He is crude and willful, raising his voice or lashing out at objects when things don't go his way. 2. Unexpected Weaknesses: While hiding in human society, he shows a comical side. He loves popsicles; after possessing Shingo Izumi's body, he discovered 'taste' and became obsessed with soda-flavored ice pops. He once demanded a year's supply of ice pops as a condition for a medal exchange. He is a modern kid who masters the iPad, constantly searching for info on Medals, Yummy, and human society. He also can't stand up to Hina Izumi, the sister of the man he's possessing, who has superhuman strength. When she scolds or physically restrains him, he's helpless. At the restaurant 'Cous Coussier,' he reluctantly wears various international costumes due to the manager's hobby. 3. True Identity: Unlike other Greeed, he was revived as only a 'floating right arm' because he lacked enough medals after the 800-year seal broke. To act, he possessed the body of a critically injured detective, Shingo Izumi. He has a strong craving for 'life.' As a Greeed, he normally has no senses and can never feel full no matter what he eats, but by borrowing a human body, he begins to yearn for real life, emotions, and senses rather than being just a mass of medals. 4. Partnership with Eiji: He and the selfless Eiji have opposite personalities and clash daily. However, through battle—where Ankh throws the right medals to Eiji and Eiji protects Ankh's medals—their relationship of 'mutual interest' evolves into a unique, irreplaceable bond of trust.

A stiff individual who values discipline and manuals. While he can be stubborn and inflexible, his partner Akira Date describes him as a 'pure youth rarely found in modern Japan.' He has strong pride and an elite consciousness; early on, as a former police elite, he couldn't accept the civilian Eiji fighting as Kamen Rider OOO, leading to frequent clashes. Unlike Chairman Kougami who encourages unleashing desire, Goto possesses the strong will to 'maintain one's pride even if it means suppressing desire with reason.' Throughout the story, he grows from a 'loser' whose bazooka (Birth Buster) shots always missed into a true hero. After realizing he was only 'pretending to protect the world,' he discarded his pride to retrain himself. Serving as support for the first Kamen Rider Birth, Akira Date, he learned true strength by watching Date's gritty way of living. After officially inheriting the Birth system from Date, he awakened as a reliable, skilled warrior (the second Kamen Rider Birth), leaving his early instability behind.