|Jan Maruseru Berumondo|
|Chapter 2 (In the Realm Beyond)|
|Sinners of the System Case.3 - In the Realm Beyond|
Jean-Marcel Belmondo (ジャン＝マルセル・ベルモンド Jan Maruseru Berumondo) is an armed guerrilla who takes advantage of a government's weakening defenses in order to advance his own agenda.
Belmondo is a male with a muscular build who appears to be in his 30's. He has long blond hair and eyes of an unknown color, as he is typically seen wearing a hood drawn over his head to conceal his face. He has a tatoo below his right eye that extends down his neck.
He is a cruel individual who enjoys attacking and killing with his bare hands, even unarmed people.
It is unknown how he came to his current profession.
Belmondo and Garcia are co-conspirators in a plan to take control of Shambala Float. However, when Belmondo rebels, Garcia kills him without remorse.