Rei Ayanami is a character from Neon Genesis Evangelion and is a major character in The Knights of the Multiverse, introduced in Season 2. Originally the pilot of Evangelion Unit 00, she piloted the Re-GZ when she joined the Knights, and later Getter Liger in Getter Robo G while the original Getter Team took command of Shin Getter Robo.
For the most part, Rei is socially withdrawn, seemingly emotionless, and rarely interacts with anyone. She appears emotionless and depressed and will follow orders without question (which can sometimes be viewed as obedient and passive), even if it means risking her life. In battle, she has no self-preservation instinct and will not ignore orders to save herself.