*Lindsey Thorndyke (リンゼー・ソーンダイク, Rinzē Sōndaiku?, lit. "Linsey Thorndyke") (née Fair[3]) is a character that appears in the anime series Sonic X and its comic series published by Archie Comics. She is a human, the wife of Nelson Thorndyke, the mother of Christopher Thorndyke and the older sister of Sam Speed. She is a very famous and talented actress whose reputation has made her a celebrity. Because of her work, she spends most of her time traveling the world or on the movie set, and as such spends little time with her family. Nonetheless, she is a loving mother and wife who cares deeply for her family.

Lindsey is a well-endowed female human of average height. She has chin-length strawberry blonde hair that sticks out at the ends, pale peach skin, thin eyebrows, and blue eyes. She also has a beauty mark below her mouth on the left side of her face.

Lindsey's standard attire includes a soft red dress with short sleeves, a red waist belt with a gold buckle, a pearl necklace, gold elaborate earrings with pearls, gold and silver bracelets, and red heels. As an alternative, she sometimes wears a pink-buttoned shirt, beige pants and white heels. She also always wears soft red lipstick.

When seen while filming her movies in the episodes "Sonic's Scream Test" and "Emerald Anniversary", she wears much more formal attire with her costumes, giving her the appearance of a Southern Belle or noblewoman to fit the roles she performs.

Lindsey is a very caring and kind-hearted, yet ditsy mother who only wants what is best for her son and tries to devote as much time as she can to him, even if she usually has no idea of which direction to turn. Chris is nothing short of the most important person in Lindsey's life, and she often buys him presents during her trips. Like her husband though, she can be oversensitive when it comes to Chris. When she does not know where Chris is or how he is doing, she tends to freak out and cry excessively.

Lindsey has been regretful of how her busy lifestyle constantly keeps her away from her son. Whenever they get together, it usually is not for very long and it has led her to believe that she is a terrible mother on occasion. Regardless, Lindsey was oblivious how deeply emotionally scarred Chris was by her and her husband's absence in his life, but they made it better in the end when they remembered a special vacationing area they all visited when they seemed more like a normal family.

Lindsey is very over-excitable and, due to her ditsy thoughts and actions, often takes things to the extreme. For example, she sky-dives from a helicopter in order to land on the balcony of her house just so she could visit Chris when he had a small cold. She sometimes tends to act a bit oblivious to certain things as well.

Although a very talented actor and having a household to cover all her homely duties, Lindsey does not mind getting her hands dirty or doing some house work herself. In fact, she seems to enjoy carrying out her motherly duties at home, like working in the kitchen (although she has proven to be a terrible cook), and always tries her best.

Lindsey is a great actress who can play virtually any role while putting in a lot of emotion. She is also physically fit as demonstrated by the stunts she pulls off during action movies.*