Kat Manx

Katherine Manx (also known as Kat) is the Earth science expert and the S.P.D. Kat Ranger. She is 21 of her years old and 147 human years old.

Early Life
Back in 2001, Kat worked with some of the parents of the B-Squad Power Rangers in developing the Morphing Technology used today in the S.P.D. Morphers. However, these experiments had side effects that, while they did not affect Kat because she was an alien, they did affect the B-Squad parents, thus their children who would become the B-Squad Power Rangers got their civilian powers.

S.P.D.
Kat is the Power Rangers' technical support. She has designed most of the Rangers' weapons and is Commander Cruger's trusted assistant and friend. Her home planet was also attacked by the Troobian Empire, so she joined in S.P.D.'s fight against evil.

Later on, Kat is recruited to S.P.D. Central command under request by Supreme Commander Birdie. She returns to Earth with a temporary morpher and becomes the S.P.D. Kat Ranger to stop an old friend with a grudge. Although her time as a Ranger is limited (her morpher has only enough power for one hour, according to Birdie; whether she used it all up or simply used some of it is unknown), she realizes the Rangers need her skills on Earth.

She and Boom are captured by Broodwing who turns the base into its Megazord configuration. Thanks to R.I.C., the two escape and shut down the Megazord, allowing B-Squad to defeat and capture Broodwing. During the final battle against the invading Troobian forces, Kat, Boom and Omega Ranger led the S.P.D. Cadets in battle to protect the Delta Base. Together they held off the forces long enough for reinforcements led by Commander Birdie and Sergeant Silverback to arrive as well as the Nova Ranger, allowing them to defeat the enemy. During the fight against Omni as the Magnificence, Kat analyzes the enemy and finds its weak spot and gives the information to Cruger and the Rangers who use it to destroy Omni, even though she knows it may cost Cruger his life. Kat is relieved to see that Cruger and his wife survived and watches the final fight between Grumm and Cruger that results in Grumm's capture. Afterwards, Kat remained at S.P.D. Earth Station.

Power Rangers Ultimate Alliance
Kat and Boom later visited Cruger at Theta Quadrant when they were pulled down to the Abyss of Evil from the future with Sophie. Cruger later handed her the Kat Morpher, which Sophie had modified to become permanent. She can change into the Kat Ranger once again.