19 years old. He's a Second Lieutenant. He comes from the well known Branstein family, and is a member of the SRX Team. He's different from his teammates, Ryuusei and Aya, in the fact that he has no special powers, only excellent piloting skills. He also has a great sense of judgement on the battlefield, and is always calm. He lost his left hand during an accident which occurred while he was testing the Huckebein 008R on the Moon.
Even now he still thinks about his deceased sister-in-law, Cattleya. The F. in his middle name is taken from Fujiwara, his sister-in-law's former name. Princess Schine is always there for him though, and tries her best to make him feel better whenever he's feeling down. His relationship with his older brother, Elzam, isn't very good. He feels envious of him, though he holds a great respect for him, and he also hates him for some of the decisions that he has made.
After Ingram betrays the SRX Team, Rai is told that he isn't needed because the completed SRX needs three Psychodriver pilots. Rai responds by telling him that as long as he is still there, then the R-2's seat is still his.
After the war with the Aerogators, he leads a special military tactics squad with Kai Kitamura and Latun Subbota. They are currently located at the Hawaiian Hickam base. Later he encounters his first new enemies, some of the DC remnants.