Roonlo, or Roonlo the Stalker, was an Aqualish male criminal who harassed Riley, sending her monthly Muckrat Skulls prior to and throughout Imperial Governor Ubrik Adelhard's Iron Blockade of the Anoat sector. He and Riley's father had issues with one another. Prior to his death at the hands of The Smuggler, he expressed an interest in Riley, requesting that he surrender Riley to him.