Professor Claude Epstein (クロード・エプスタイン博士) also known as C. Epstein is the historical inventor and official founder of orbal technology, which utilises devices that operate by drawing orbal energy from septium. Epstein left various prophecies that have come to pass in the games.
Profile[]
Legacy[]
50 years prior to the events of Trails through Daybreak, Epstein designed the Trion Tower in Edith, the capital of Calvard.
During the Orbal Revolution, Epstein created eight prototypes for Orbment technology known as the Oct-Geneses.
Professor Epstein passed away in S.1154 with no known children by blood. His adopted daughter, Lilia Epstein, went into hiding, changed her name to Lilia Claudel, and cut contact with Professor Epstein's three leading disciples for the rest of her life.
One year after his death, the Epstein Foundation was established in Leman, the birthplace of Professor Epstein. It was founded by his leading disciples: Albert Russell of Liberl, Gerhard Schmidt of Erebonia, and Latoya Hamilton of Calvard. The foundation was dedicated to continuing Epstein's work.

It's revealed that F. Novartis was the original disciple to Epstein in a previous timeloop of Zemuria. However, in the current timeloop, F. Novartis has joined Ouroboros, with Epstein having three new disciples who were not aware of Novartis.
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Trivia[]
- In Trails of Cold Steel III, it was revealed in the side quest with the Eternal Kandelaar that Professor Epstein was one of the few people that knew how Artifacts could work.
- Based on comments from Campanella and Mariabell Crois in Trails of Cold Steel IV, Professor Epstein was also one of the few people that knew about The Beyond.
