ES (Eternal Sabbath) (Japanese: エス エターナル サバス, Hepburn: Esu Etānaru Sabasu) is an eight-volume manga series by Fuyumi Soryo.

Though the scientists' original intention was to demonstrate the feasibility of eternal life, ES unexpectedly has the additional power of mind-control and memory-alteration.

A female neurology professor, Mine Kujo, meets a man by the name of Ryosuke Akiba and discovers that he is a genetically engineered human with the ES gene.

Extremely intelligent, often scaring her "omiai" (speed-dating) partners away by speaking about the exact kind of thing you're not supposed to speak about when dating someone - the reason why alpha lions eat lion cubs, ray mantas' mysterious and exciting way of procreating, that sort of things.

She is qualified by Shuro as a "dense woman", in that she is one of the very rare humans whose minds cannot be totally invaded and controlled by the powers of an ES; mindspeaking and (painful) hallucinations are as far as it goes.

Any light or sound would be kept from reaching him in order to avoid the "rise of sentience"; the researchers planned on dissecting him to study his viscera right after taking him out of the mechanical womb.