Ellie is described as "mature beyond her years" as a result of the circumstances of her environment. She is characterized as strong, witty, and "a little rough around the edges". Her emotional trauma is accentuated after her encounter with David
Having lost many people in her life, she suffers from severe monophobia and survivor's guilt. This results in her becoming a very hardened person; she uses violence without hesitation and frequently employs profane language. She is also a lesbian