Aamin Marritza was the head file clerk at the infamous Gallitep labor camp on Bajor under Gul Darhe'el. While at Gallitep, Darhe'el praised Marritza's work as a "masterpiece of meticulous exactitude," but Marritza took no pride in his commander's praise; indeed, Marritza was so overcome with grief upon hearing the screaming and begging for mercy by the Bajorans at the camp that he would often hide under his desk, covering his ears and weeping. He served at the camp until its liberation in 2357.
Following the Cardassian withdrawal from Bajor, Marritza relocated to Kora II where he became an instructor in filing at the Cardassian Military Academy. While on Kora II, he underwent cosmetic surgery to resemble Gul Darhe'el. His plan was to convince the Bajorans that he was Darhe'el so they would convict and punish him as a war criminal as a way to force Cardassia to acknowledge the atrocities committed during the Occupation of Bajor. He was also full of guilt concerning his service to Darhe'el and because he did nothing to help the Bajorans.
He traveled to Deep Space 9 in order to be exposed as Darhe'el. He had a rare disease, Kalla-Nohra Syndrome, for which the only cases were the result of a mining accident at the Gallitep forced labor camp. He claimed to be Marritza in order to convince the Bajorans that he was really Darhe'el posing as Marritza. His plan was almost successful. He convinced Kira Nerys that he was the 'butcher' of Gallitep, clouding her judgment by boasting of the atrocities at the labor camp and filling her with so much rage that she wanted him to be Darhe'el.
Marritza's deception and plan was unraveled by Odo. Odo discovered Marritza was seeking information on Kira months ago, and that Gul Dukat told him that Gul Darhe'el was dead. More importantly, Gul Darhe'el wasn't on Bajor when the mining accident that caused the Kalla-Nohra condition occurred. Doctor Bashir found that Marritza had his face changed to look like Gul Darhe'el and was taking massive doses of a dermatiraelian plastiscine, a dermal regenerative agent. Even with all the evidence against him, Marritza asked Kira to help him complete his plan so that Cardassia could face up to its evils.
Aamin Marritza was played by actor Harris Yulin.
Marritza as seen on the computer monitor in 2357 was played by an unknown actor.