Korra

Korra is Seven's mother, which makes her the first human ever to bear an inama child. Before this though, Korra was a girl who's family were refugees from Somalia that found shelter in Lagos. Korra was raised to be a fair and just woman, despite the horrors she'd witnessed. It was due to this education that Korra eventually joined the PFA where she became a diplomat sent to the inama in southern Africa on a diplomatic mission. A mission, which ended with her death...

To the people of Lagos, Korra was simply murdered by the vicious inama in the south, while Ayala, the diplomat sent north, suffered the same fate. In truth, Korra fell in love with the inama leader Tosun, and, more than that; Korra was impregnaetd by Tosun.

Korra's Death
In a secret mission, a black ops unit including Chitara and Akiji were sent to retrieve Korra. When the black ops were given the order by Ryker to execute Korra for fear of a possible infection with the inama virus, the mission went off the rails: In order to save the pregnant Korra, Akiji, who'd just learned of his wife Ayala's death, murdered his fellow black ops members, before Korra was shot and killed by Chitara. Not able to pull the trigger on his own sister, Akiji was unable to save Korra's life but he was able to deliver her son: Seven.

With the circumstances of her death shrouded in secrecy, no one truly knows what happened. To the people of Lagos, Korra's death was a tragedy that, along with Ayala's death, has created the current pro-war climate. To Chitara & Akiji, her death was an inexplicable order that caused a seismic rift in their relationship and resulted in them being appointed as Guardians.

Truly, only Ryker and those above him know the truth.

As for Seven.. as far as Akiji knows, he is the only one aware that the boy survived.