Who is Clarissa Fairchild?
Clarissa "Clary" Adele Fairchild is a fictional character and the main protagonist of the 'Mortal Instruments' series, which is part of a bigger Fandom, Shadowhunters, written by Cassandra Clare (Judith Lewis).

Clarissa "Clary" Adele Fairchild, also known as Clary Fray, is the Shadowhunter daughter of Jocelyn Fray and the notorious Valentine Morgenstern. For years, Clary lived a mundane life with Jocelyn, until the return of her father and her brother, Jonathan, exposed her to a new world, throwing their lives out of balance as Clary found herself on a journey with her fellow Shadowhunters to stop them.
As a result of her father's experiments, Clary possesses more angel blood than other Shadowhunters and, through this, the ability to recall powerful, ancient runes not written in the Gray Book.

Clary is 5'2" with curly red hair, green eyes, pale skin, and freckles. She is said to look like her mother, who is described as beautiful and small. Clary sometimes doubts the fact that she is as beautiful as her mother, believing herself to be a duller version of her mother, with less defined features. She is rather small and thin. She is described by Jace many times throughout the series as "delicate".

She is portrayed by Lily Collins in the film adaptation of the book and Katherine McNamara in the television series.

Details and Trivia
She is the daughter of Valentine Morgenstern and Jocelyn Fairchild, stepdaughter of Lucian Graymark. She is also the sister to Jonathan Christopher 'Sebastian' Morgenstern.

She gained her ability to create runes when Valentine fed her mother angel blood while she was in the womb.

Nicknames are Clary and Biscuit.

-- More About Clary Wiki Link
-- IMDB Link
-- Wiki Fandom Link