Lindsay Cartwright

Lindsay Cartwright is the proprietor and lead scientist of the Crescent Bay Dinosaur Museum. After Albert retires and gives the Purple Energem to the Dino Charge Rangers, she later acquires it and becomes the new Dino Charge Purple Ranger. She is Heather Merrill's former boss and arch-frenemy (friend and enemy).

The Hybrid Girls
Lindsay visits Heather and Hayley in Riverside, California where they live when a monster targets former Thunderstorm power rangers. However, she and Heather start to clash once again. Later, Heather scolds Lindsay for her conflict with the Ninja Steel power rangers, especially green ranger Jade Shapiro, a teenager. She was even appalled when Lindsay took her anger with Jade out on Jade's 10 year old sister. Ray Shiba and his teammates try to play mediator to the bickering "smart girls" with no avail. When Samurai Yellow ranger, Anya is injured in battle due to her trying to end Heather and Lindsay's arguing, Ray refuses to let them help them battle monsters because of their inability to end their hostilities to each other. Realizing that she and Heather have been setting a bad example on their friends and feeling guilty for what happened to Anya, they agreed end their feud and work together. After the battle, Professor Thomas and the Samurai ranger demonstrated the events of Heather battling J.D. in order to save him, to help Lindsay understand Heather's choice to help him. Jesse Martinez volunteered to be J.D. When Lindsay is questioned on whether to save Jesse or not save him from mind-control by Ray, she stood her ground and tells him she would rather save him, only to learn it was a test. Lindsay finally understood the test, she need to understand Heather's choice to save J.D. she apologized for mistrusting Heather's judgement and was proud of her for standing by her friends through their tough ordeal. She complimented on Heather having the guts to take a beating from monsters to save her friend.

Personality
Lindsay is confident, direct, and rarely gets emotional, except for the episode The Rangers Rock!. She hates being called by her first name apart from certain people such as Keeper, Luka, and Heather and ensures everyone else calls her Miss Cartwright. She directly has a serious demeanor and doesn't make friends easily, which was the cause for her to butt heads with Heather Merrill and her successor, Jade Shapiro. Deep inside, she's a bit lonely, and starts to learn the deeper meaning of friendship as she comes to respect and understand her Ranger family. She isn't as forceful as a "commander," but she's more insistent than a best friend. She's shown to accept a Neanderthal for who they are like Luka.