Born April 9, 1957, 58 years old. It has the post of deputy commander of the secret organization NERV.
Before the Second Impact, a professor of Meta-Biology at Kyoto University. Here he met Yui Ikari and Gendo Rokubungi, who later married. They begin with a series of works culminating in the Human Complementation Project and the subsequent creation of the organization GEHIRN.
Fuyutsuki is the assistant and confidant of Gendo Ikari, becoming a kind of external awareness of this. On several occasions in discussions with Gendo, which are loaded with a humanistic philosophy.
Always supporting his former pupil, his task is not limited to be only his counselor, but to ensure compliance with plans of Gender, which will put you in a dangerous situation. This is demonstrated when it kidnaps SEELE for questioning because they harbor growing doubts about the true intentions of Gendo Ikari.
Is the person who is closest to the leader of NERV, and its only member of trust within the organization. Making it the second most knowledgeable person about Human Complementation Project.
In the movie The End of Evangelion, is Fuyutsuki by NERV when attacked by the army. LCL is dissolved in the Third Impact seeing Rei Ayanami in the form of Yui in front of him.