I've just been thinking a little. Gil has B(A+) Divinity and he can tell Angra Mainyu to go blow and it ends up giving him a body, and he can't be corrupted or controlled by the Shadow.
Saber, with no divinity, gets corrupted and controlled.
Berserker, with A rank Divinity, does not get corrupted per se, but gets blinded and made to think he's still fighting Saber Alter to protect Ilya.
So if Gil, in the belly of the beast, lets go of his dislike for the gods enough to let his Divinity go back to A+ to fight back the Shadows influence. Thus he can't be controlled or corrupted by the Shadow.
Rider has E- divinity which was higher supposedly earlier in her life, but got lowered due to her monstrous nature as a Gorgon growing. Thus she's less divine and can't go back to it. Gil's divinity is lowered due to his dislike, not due to anything that has happened to his mind, body or soul to affect it.
Just a theory I've had the pleasure of concot while arguing on /a/.
Saber, with no divinity, gets corrupted and controlled.
Berserker, with A rank Divinity, does not get corrupted per se, but gets blinded and made to think he's still fighting Saber Alter to protect Ilya.
So if Gil, in the belly of the beast, lets go of his dislike for the gods enough to let his Divinity go back to A+ to fight back the Shadows influence. Thus he can't be controlled or corrupted by the Shadow.
Rider has E- divinity which was higher supposedly earlier in her life, but got lowered due to her monstrous nature as a Gorgon growing. Thus she's less divine and can't go back to it. Gil's divinity is lowered due to his dislike, not due to anything that has happened to his mind, body or soul to affect it.
Just a theory I've had the pleasure of concot while arguing on /a/.