Katherine Fitz

"We brought her home yesterday. We're calling her Katherine Ella."

- Aria about Katherine

Katherine Ella Fitz is the adoptive daughter of Aria Montgomery and Ezra Fitz.

Trivia

 * While not mentioned directly in either series, Katherine was revealed to exist in an exclusive text message leak from Alison's phone via Twitter.
 * Her middle name honors that of her maternal Grandmother, Ella Montgomery.
 * She is the only known adopted member of the Fitz and Montgomery families.