She has been in the same body since her birth  and finds it disturbing to be presented with her own detached limbs. She approached Union Robotics to have her ankle joint repaired because the police force's in-house repair guy is a jerk and does subpar repairs. 
Her name is a reference to the "Roko's basilisk" thought experiment.
It seems she has a fetish for bread.. Dating site Computr matched her with Pintsize because of this desire to launch toast at his partners. Roko is embarrassed about her fetish and sometimes starts venting when other people start suspecting it.