Linda Drysdale

Linda Drysdale is the eldest child and only daughter of Harlan Thrombey.

Biography
At the end of the film, she discovers a letter from her father and learns that Richard is having an affair.

Personality
While Linda comes off as a stern, short-tempered woman, she is shown to care deeply for her immediate family. Linda appears to be close to Walt, referring to him as her "baby brother" and becoming defensive when the investigation pries into Walt's status within the publishing company (something her husband Richard does not).

Unlike the rest of the family, Linda's motivation in receiving Harlan's inheritance does not appear to be a desire for financial gain, but possessiveness over her father.