Rei Six

Rei Six (レイ·シス) ("Six" meaning "six" in French) is a fictional character from the Neon Genesis Evangelion: ANIMA novel. She initially pilots the Evangelion Unit-0.0 [Six], but later becomes the pilot of Evangelion Unit-00 Type F.

Profile
Rei Six is the most young-looking of the clones and has a the body of a seven year old. Due to this, when piloting another clone's Evangelion, she needs to have modifications in the entry plug to reach the parts where she controls. She is monitored by Type-N Robots.

Neon Genesis Evangelion: ANIMA
After the events of the SEELE attack on the NERV base, several other Ayanami clones were cultivated in artificial wombs. By observing how the the soulless clones in vitro would show a synchronicity in motion and brain activity with the one possessing a soul. They develop a method of mental mirroring that allows Rei Trois to control her clones.

Six was specifically developed for zero gravity engagement. Although the Ayanami series clones produced at NERV were said to not develop self-awareness, being remotely controlled by the original Rei via a mental mirror link, Six began to develop an unstable personality after Rei Quatre's mind contamination in Volume 1, but is given the full support of NERV personnel, who worry for her safety.

She is good friends with Mari, having similar ages. She also appears to have a siblings relationship with Tōji and Rei Cinq(which became essential to counterbalance Six's unstable mentality) and also befriends Hikari Horaki. Misato nicknamed Six "Chiba-nami" due to her young appearance.