Krana Za were one of the eight types of Krana. They made it possible for their Bohrok to communicate telepathically with others in the swarm.1 They had the ability to communicate telepathically with the other krana of the swarm.2 Their power was telepathy.2
Notes
Their role was squad leader.3
Krana Za provided its wearer with the ability to communicate telepathically with other krana of the swarm. Its role was squad leader, and its power was telepathy.4
Krana Za were squad leaders. Their telepathic powers were mean to communicate with their swarms. However, the Krana Za which took control of Lewa's mind was able to read Onua's thoughts as well.5
Matau was given a Za instead of a Xa despite his leadership position in the swarm. He didn't need the strategic help provided by a Xa, so it was more important for him to be able to give out orders more quickly.6