Jkou is a blind Yahg, currently kept in a secured location somewhere on the Citadel and part of Sal's psychological sessions with Vayla Demrega.
Taken off Parnack[]
Jkou was taken off Parnack by various members of Salarian Union who intended to turn yahg into a peaceful and well-socialized species, capable for galactic civilization. Jkou, astonishingly, was a yahg that could reason without the need for social experiments to conduct on him but was still kept in his confinement due to the suspicions of him possibly using a peaceful stance to mask a uncontrollable angry behavior.
Transfer to the Citadel[]
Having earned the respect of his captors Jkou was transferred to the Citadel a week before Saren's geth armada attacked it. The heavy damage sustained by the attack forced Jkou to be moved to a more secure cell which resulted in him to lose wood carving as a favorite past time and a shock collar placed around his neck to ensure his behavior was kept in check. As he is given back his favorite occupation he meets Sal Polaris, a newly inducted member of the Citadel Security Special Forces, and Mira's protégé.