Gratigan was the second-in-command of the Poliaz City Guard, and Soleku an accomplished singer and musician of the White City. The fact that the two wished to marry was well known, but everything changed when the Kanohi Dragon attacked the city and killed its last toa guardian. Banding together with the rest of the guard and many other warriors, they drove the beast away from their island, and for their bravery were entered in for an experimental Toa-making prcess devised by the island's Vortixx general. It was a grim success. Of the thirty matoran that entered, only five survived. These five were the Toa Vanembar.