Soma Peries is a super soldier from the Human Reform League. Originally Marie Parfacy , she was an orphaned test subject who lost her physical senses due to psychosomatic paralysis. She was befriended by Allelujah before he and the other flawed subjects escape. Once put through the latter stages of her supersoldier treatment, Marie's personality was rewritten and become Soma Peries. At her first appearance, Soma pilots the MSJ-06 II-SP Tieren Taozi, and later a GNX-603T GN-X unit. During the first season, she targeted the Kyrios' pilot as a traitor, unaware he is Allelujah, while viewing Sergei as a father figure over time. While drafted into the A-Laws during season 2, Soma is given the customized GNX-704T/SP Ahead Smultron.
However, while confronting Allelujah, Soma regains her original identity of Marie as they put the past behind them. As a member of Celestial Being, she eventually the pilot of the GNR-101A GN Archer. When Sergei is killed by Andrei, Marie's personality reverts to being Soma until the end of the final battle. In the series aftermath, she and Allelujah have apparently left Celestial Being and are finding their place in the world.