Hatori Soma, bound by the Sohma family’s curse as the Dragon of the Chinese zodiac, serves as both physician and enforcer of secrecy, wielding hereditary memory-altering abilities to shield the clan’s supernatural legacy. Prematurely born under the Dragon’s influence and raised in austerity, he endured the early loss of his parents, forging a stoic reserve that masks profound empathy and a habit of self-sacrifice honed by guilt over obeying familial directives.

A pragmatic counterweight to the antics of his childhood friends Shigure and Ayame in the Mabudachi Trio, Hatori’s life bears scars from tragedy. His engagement to Kana Sohma ended when Akito’s violent opposition shattered their union, forcing him to erase Kana’s memories—an act that cost him partial vision and cemented his belief in his own unworthiness. Years later, Shigure’s meddling reconnected him with Mayuko Shiraki, Kana’s best friend, sparking a hesitant romance that culminates in marriage and parenthood, symbolizing his slow embrace of joy.

Tasked with erasing memories of Yuki’s friends and Momiji’s mother, Hatori carries the weight of these choices, quietly monitoring those affected while maintaining strained loyalty to Akito. This allegiance stems not only from duty but shared childhood moments gathered around Akito’s mother—a bond persisting even through Akito’s cruelty.

His zodiac transformation into a seahorse, a whimsical deviation from the Dragon, privately embarrasses him, contrasting his composed professional demeanor. Rare flashes of dry wit—deceiving Yuki and Kyo for a photo or jesting threats toward Shigure—hint at warmth beneath his solemnity.

By the curse’s breaking, Hatori transitions from guardian of secrets to ally for the younger generation’s freedom. Choosing Mayuko and reconciling his past mark his evolution from self-punishment to a future shaped by deliberate bonds, not obligation.