Aiguo

An ESAB agent who plans on throwing his life as its operator away, to begin anew one with Mutsumi, though he isn't aware of any of it.

    Working undercover in the Qi'andu Empire for over three decades, Aiguo (not his birthname, but rather one to fit in with the locals; his birthname is remembered only vaguely by himself, and his very existence was erased from Banshou records with the forging of his death) has adapted so well to Qi'andu life and citizenship, so used to the peace and calm of everyday life of a nation which is free from militarism, internal oppression, and state terrorism, that he no longer holds any desire to assist in the Banshou Empire's mission anymore. Though he still keeps up appearances for headquarters, it's becoming clear his devotion to his original nationhas long faded, and it's only a matter of time until he officially deserts them.
   As one of the few people Mutsumi could trust, if not the only one, they already began to develop a friendly relationship prior to the BASE agent's final mission, during which he has gone officially rogue. Now, Mutsumi survives each day with Aiguo's forbidden aid, who hopes to establish peace between nations and, little does Mutsu know, a far more intimate relationship with him as well.

 he/him