Keiji Okuda

Keiji Okuda was Kasumi Goto's former partner, lover, and a former member of the Alliance Intelligence Agency under the alias of Abraham Rumoi. They first met when they were hired to steal the same painting. Instead of turning it in to their employers, they kept it. Due to his work he had a Graybox implanted to allow him to remember what he needed to in order to do his job. Eventually, he acquired some very sensitive information that if made public would do a lot of damage to the Alliance's reputation. When he acquired the information he came under prosecution due to his work of stealing classified information and selling it. However prosecuting attorneys were forbidden to use his graybox memories to incriminate him due to an Alliance statute based on the Fifth Amendment of U.S. Constitution about self-incrimination. After the trial, he vanished and was eventually tracked down and killed by Donovan Hock. Hock removed his greybox and has been trying ever since to crack it.

After Kasumi joins up with Shepard, she asks him to help her retrieve the box during a mission to Hock's estate on Bekenstein. The mission eventually sees to the killing of Hock and the recovery of Keiji's graybox.

After the mission, Kasumi accesses the box and sees her partner one last time. He says that if she is watching this then he is dead and then he reveals the data. He asks her to destroy the data and the memories. Shepard can persuade Kasumi to follow Keiji's wishes or keep the data.