Early life (1980-1991)
Lydia was born on March 16th, 1980 to Natalie and Mr. Martin in Great Britain. At some point in her life, her IQ was tested, and she rated a genius-level score of 170. When she was young, she was very close to her paternal grandmother Lorraine, with whom she read many books. Her favorite was The Little Mermaid by Hans Christian Andersen, which she loved so much that she insisted she be called Ariel, a trait Lorraine found adorable.
Hogwarts years (1991-current)
Lydia was sorted into Ravenclaw during her first year at Hogwarts. She has managed to complete the first three years without much incidents.
Lydia is a beautiful thin and petite woman with very pale skin, green eyes, and long strawberry-blonde hair. Her style leans toward the very feminine, and she is nearly always seen wearing dresses or pencil skirts with dressy blouses and high heels or booties. However, due to Lydia's developing fighting skills, she has recently started to wear shorts and jeans more often than dresses and skirts due to the fact that they're more practical, given that she may need to fight at any moment; despite this fact, she still prefers to wear boots rather than sneakers. She typically wears her hair at least partially pulled away from her face, and has a tendency to braid it up in a milkmaid style. She likes to keep her eye makeup to a minimum in favor of wearing bold colored lipstick, and occasionally wears thin chain necklaces or simple rings.
Personality and traits
Lydia put on an act of being the vain, shallow, ditzy mean-girl despite having an IQ higher than anyone. However, Lydia's fake persona began to fade away, revealing the true Lydia underneath-- one who was kind, loyal, extremely intelligent (and unafraid to show it), and determined to help people however she can. She is especially talented at math, physics, and languages, having taught herself both Archaic and Classical Latin as well as being somewhat fluent in French and Spanish, and once insisting that she would one day win the Fields Medal in mathematics as a result of inventing a new mathematical theorem.