Rei Ayanami is a main character in the 1995 anime Neon Genesis Evangelion.

From her Wikipedia page: "In the anime series, Rei is an introverted girl chosen as the enigmatic pilot of Evangelion Unit-00, one of a series of giant mechas called Evangelions. She is called the First Child among the Evangelion pilots. At the beginning of the series, Rei is a mysterious figure whose unusual behavior astonishes her peers."

Rei has pale skin, light sky-blue hair, and red eyes. Her distinct and somewhat unnatural appearance marks her visually as an outsider from the rest of the cast.

Rei is physically 14 years old; however, given that she is actually a clone of another character, it can be implied that her growth has been manipulated by NERV.

Again from her Wikipedia page, "[Rei] is introverted, uncomplaining, socially detached, and laconic."

WHY REI?