I’ve been thinking: Considering how in Final Fantasy 7 Remake after absorbing the Arbiters of Fate Sephiroth’s mannerisms change to what they were before the Nibelheim Incident what are the chances that Sephiroth will be the one impaled by Jenova taking Sephiroth’s form and not Aerith?
The Arbiters of Fate know History so if Sephiroth absorbed them he would know enough to realize that Jenova is not his Mother and that he was merely the Human Son of Lucrecia Crescent injected with Jenova Cells.
It would be ironic considering how Sephiroth’s whole personality is based on what he saw himself as: 1st as a Soldier with no knowledge about his history, 2nd as a Cetra wanting to avenge his people and 3rd as an Alien Invader seeking to conquer the World. Learning that he is a Human merely enhanced by Jenova while in his Mother’s Womb might return him to his first persona.
That might be enough to make him repent from his actions and seek to fix things taking the role of protecting the world with Holy himself(which would require that he sacrifice himself)!
I’m sure Jenova would be baffled by his rebellion using the same taunt it used on Cloud in FF7 by calling him a Puppet and as soon as Sephiroth is dead turn into a hybrid of Cloud and Sephiroth(I.E. turn into Kingdom Hearts Sephiroth who is Sephiroth with Cloud’s face) just to taunt Cloud for his failures!
As for what Jenova’s personality without Sephiroth would be like: It will be drawing solely on Cloud’s idea of it: a Sadist mocking Cloud who seeks power for power’s sake. Jenova will become Cloud’s Darkness taking on a hybrid of Cloud and Sephiroth’s forms just like Kingdom Hearts Sephiroth!
Also I’m starting to suspect that Minerva from Crisis Core is the Calamity of the Sky and Jenova is either someone infected by her Virus or is Minerva’s sealed form.
I suspect after Sephiroth sacrifices himself and Cloud and Aerith beats Jenova Life they join Zack in facing Genesis who after listening to Zack’s speech about Angeal and Sephiroth lets himself be killed and have his Spirit be taken into the Lifestream by Angeal and Sephiroth enraging Jenova in KH Sephiroth’s Form into fighting Cloud, Zack and Aerith for the Final Boss of FF7 Remake Part 2 played to the theme of Crisis Core’s The Price of Freedom.