Talk:Kamijou Touma/@comment-114.79.37.34-20140602181736/@comment-11571396-20140608044237

Er, all Fallen Angels are demons, that's litterally synonym in Christian theology. I would say that it's actually not all demons are Fallen Angels, with all the different definitions of demons in many cultures.

But all of this does not matter, as I said, the answer is right there on this very wiki about what they are in-universe (and since everyone seem too lazy to look it up...):

In the world of Toaru Majutsu no Index, all fallen angels are automatically referred to as a Demon (悪霊 Akuryō?).

(...)this is when they become demons, known as Fallen Angels.

And from the novels (volume 4):

"If one of the cars couldn't receive the commands because of some failure, or if the command received was wrong, it will become what we call a demon."

"An angel's power is neither good or evil. Those who were directed by God to save mortals will be praised as angels. Once they fall onto the corrupted earth, they will become terrifying demons."

Can we finally say case closed?