Jenova is an extraterrestrial lifeform, composed of cells that carry its will and power even when separated. Sephiroth is the result of a being who can successfully fuse with Jenova's cells. Furthermore, Jenova's cells can change their form and appearance, even from male to female, and takes the shape of Sephiroth before battle. Jenova originally crashed into the Planet and began infecting the residing Ancients until they almost died out; it was later excavated by Shinra and mistakenly thought to be an Ancient. Scientific experiments were done with Jenova's cells in an attempt to make stronger soldiers, and as a result, SOLDIER was born; each member was injected with Jenova cells, with the exception of Sephiroth, Genesis, and Angeal. Angeal's mother Gillian was injected with Jenova cells allowing those cells to pass on to Angeal from her. Sephiroth was injected with Jenova cells during the fetal stage and Genesis was injected with Gillian's cells while in the fetal stage. Sephiroth and Jenova's goal for Final Fantasy VII and Advent Children was to take control of the Planet and roam through space until they found a planet that they could thrive on. In Advent Children, Jenova's last remains are acquired by Rufus and three Remnants of Sephiroth hope to find them and resurrect Sephiroth. The creature is also responsible for the disease Geostigma, which infects all those who contain Jenova cells. The incident at Nibelheim, where Sephiroth becomes insane and dismembers Jenova's head and proclaiming that they would go to the Promised Land, is adapted in Before Crisis, Last Order, and Crisis Core; in each installment, Jenova appears as a human-like, nude, blue-skinned woman preserved inside of a glass tank filled with liquid.