Emperor Gruumm is the warlord and comander of the Troobian Forces. He also plans to take over Earth and conquer it along with his right hand villains, and robotic Krybots his evil soilders. He also wants to steal Earths valuable resourses for his evil forces and needs.
Mora is a 10 year old evil child. She is Emperor Guumm's second hand servent. She creates the evil alien monsters.
Don't be fooled by this one. He helps the Power Rangers by finding out things for them as he informs them of what's going on. But really he is on Emperor Gruumm's side and always was. 
These are the Krybots. Emperor Gruumm's robotic soilders. They attack in groups. 
They are the second version of the evil robotic soilders the Bluehead Krybots. Which are tougher and harder to defeat.