Rei has short pale blue hair with bangs centered to the middle and has red eyes. 

She usually wears a high school uniform, which consisted of a dark blue pleated overall dress over a white button-up blouse with short puffed sleeves, a red bow attached to the collar, white loafers and black ankle socks. 

She can be often seen wearing bandages her arm and her right eye. (due to injuries from the battles against angels.)

Rei is 14 years old. She's Shinji Ikari's classmate. And is pilot of Eva 00