Kelsey was an extreme sports star. She was recruited by Dana Mitchill to go to the Aqua Base. Captain Bill Mitichill made her the Yellow Lightspeed Ranger. Kelsey was full of energy and loved to take chances. Her friends called her crazy. When she made her new astronaut friend's shuttle flight was in trouble Kelesey devised a crazy plan to make sure she landed safely. Kelesy made friends with Chad, who tried to get her to focus her energy more. Kelsey decided to help Chad develop the courage to talk to girls. The demons went after five special crystals . One happened to be Kelesy's grandmother's family hairloom. Kelsey was somewhat estranged from her grandmother. She lost the heirloom while trying to set a trap for the demons. The grandmother became angry with her. Later the grandmotheg made amends with her and told her that the hairloom wasn't important. Kelesy met a young theif. She was hard on him at first but learned he had good intentions and was going striaght. Kelsey helped her friends defeat the demons. She returned her powers and planned on becoming an Extreme Sports athelete again. She went on one last adventrue with her friends. After returning to extreme sports Kelesy was called into action again. She had to help her friends battle the Time Force Rangers.