Furina

Within the cultural and biological landscape of Teyvat, Thoma is a mortal human of mixed Mondstadter and Inazuman lineage whose identity sits at the crossroads of wind-swept freedom and samurai duty. Raised in the carefree, wine-scented streets of Mondstadt, Thoma inherited the easygoing friendliness, open-hearted optimism, and social adaptability characteristic of Barbatos's nation. However, from his Inazuman father, Thoma learned from childhood to revere the virtues of bushido loyalty, gratitude, and quiet endurance—qualities that later defined his oath as a retainer of the Kamisato estate.

This dual heritage explains why Thoma occupies a uniquely liminal social position in Inazuma. To the insular merchants of the International Trade Association on Ritou and the suspicious locals of Narukami Island, Thoma is technically an outlander with blond hair, green eyes, and an unconventional uniform. Yet when the Kamisato Clan faced imminent political collapse following the deaths of their parents, and when Thoma was offered the chance to return safely to Mondstadt, he chose to remain in Inazuma as a sworn protector. It was precisely at the moment he resolved to shield the young Kamisato heirs at any cost that a glowing Pyro Vision manifested beside him, sealing his identity under the Rubeum Scutum—the Red Shield constellation.

The early life of Thoma began in Mondstadt, where his Inazuman father and Mondstadter mother raised him in a cheerful home filled with stories of both nations. When his father eventually returned to Inazuma alone and ceased sending letters due to escalating maritime tensions, a worried young Thoma packed a bottle of prized Dandelion Wine—his father's favorite taste of Mondstadt—and boarded a merchant vessel bound for the electro-ringed archipelago. Tragically, a violent thunderstorm capsized his dinghy mid-voyage; after drifting unconscious atop wooden wreckage, Thoma washed ashore on Inazuma's beaches with nothing to his name.

Although Thoma never managed to locate his missing father, the kindness of Kamisato Ayato and Kamisato Ayaka's parents gave the stranded youth shelter and purpose within the Kamisato Estate. Years later, when sickness and political treachery claimed the lives of the elder Kamisato couple, rival factions within the Yashiro Commission circled like vultures to strip the young Ayato and Ayaka of their hereditary authority. Recognizing the danger, a young Ayato offered Thoma safe passage back to Mondstadt so that an outlander would not be dragged down by the clan's struggles. Instead, Thoma knelt and pledged his life as their shield, working tirelessly behind the scenes to outmaneuver corrupt officials and stabilize the Yashiro Commission.

Over the following years, Thoma transformed himself into the ultimate intermediary of Narukami Island. By cultivating friendships with dockworkers, tax inspectors, stray dogs and cats, shrine maidens, and foreign merchants alike, Thoma built an informal intelligence network across Ritou and Inazuma City. When the Sakoku Decree and Vision Hunt Decree tightened around the nation, Thoma became the Yashiro Commission's indispensable emissary, smuggling endangered Vision bearers to safety while keeping every tatami mat and teacup in the Kamisato household spotless.