The fictional villains of the Power Rangers that appeared in the television series Power Rangers Ninja Storm were aliens that served the ninja-master Lothor, including his nieces, Marah and Kapri.
Information about Lothor's other minions can be found below:
Lothor, born Kiya Watanabe (portrayed by Grant McFarland), is an exiled evil ninja master. His history is revealed by the middle of the season during the "Samurai's Journey" three-parter. When Cam Watanabe travels back in time to acquire a great power source, he meets younger versions of his parents and learns of an unheard of uncle, Kiya. Kiya is shown to be loose with the rules, in contrast to his brother, Kanoi. However, no expected Kiya to seek to steal the Samurai Amulet (the great power source) from Cam's mother. Attempting to frame Cam, his plan was foiled and exposed by Kanoi. After Cam defeated Kiya in combat, the sensei of the academy banished Kiya from Earth. Cam realizes the truth, as Kiya proclaims before being banished, "I will take the name of the ancient warrior of evil. From this point, I will be known as Lothor! … I will not forget the part you played in this, Brother! I will have my revenge!" As a student at the Wind Ninja Academy, he wore a yellow and black uniform, implying that he studied under the Earth element.
Lothor spent years in space to slowly build an army of evil space ninja (space aliens trained in the dark ninja arts). He intended to conquer Earth and destroy all the protecting ninja academies with their ninja masters, allowing him to become the ultimate dark ninja master. He also first encountered the bounty hunter, Vexacus, and developed an intense rivalry with him. He also apparently married during his exile, as Kapri and Marah were not blood relatives, though no wife was ever seen or otherwise alluded to.
Read more about Lothor at Wikipedia ...
Official Site: Saban
Links: Wikipedia Power Rangers wiki Power Rangers Central