Loki is one of the Promised Children, a mage and puppeteer who appears as a supporting character in the Unbreakable Machine-Doll series. He is the younger adoptive son of Bronson and the younger brother of Frey, and he studies as a second‑year student at the Walpurgis Royal Academy of Machinart, backed by the organisation Divine Works. His automaton is Cherubim, a humanoid‑type doll with a plate‑armour appearance. Loki holds a position as a member of the Rounds, the elite group of thirteen top puppeteers who participate in the academy’s Night Party tournament. He is also known by the epithets Blade Emperor and Sacred Blaze, which hint at his combat‑oriented style. Loki’s motivations are tied to his family ties and his allegiance to Divine Works, and he often acts as a rival to the protagonist Raishin Akabane. His key relationships include his sister Frey and his adoptive father Bronson. Although the available information does not detail a major character arc, his role in the story is that of a skilled and competitive puppeteer whose abilities are demonstrated through his control of Cherubim and his standing among the Rounds.