Demons and angelic hierarchy

When the demons fell from heaven, did they keep their angelic hierarchy or rank?
Like when a demon was a former seraphim, does it kind of stay the same?.. Though it’s occupation would obviously change seeing how it’s changed into a being of pure evil.

Yes, they keep their nature they were created with. Mtndwellar gave this link to a Catholic website that is run by a priest that has some of his sermons and lectures. I found them refreshing, and insightful. The lectures on Spiritual Warfare and Angels & Demons were great to listen to.

http://www.sensustraditionis.org/multimedia.html

The demons remained the same. They were not stripped of knowledge or lose any power.

St. Thomas tells us that each angel is a different species. So, each angel has unique characteristics which are very different from every other angel. The same must be true for demons.

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