Camael was once the most powerful non-Seraph on the Seraphim Council. More powerful than Eli. More powerful than Raphael. More powerful than even Yves. He was also the first of the Elohim to Fall.
In theory, this is someone who would have had a real chance at contesting Lucifer’s right to the throne of Hell – so why is he a non-entity in the In Nomine cosmology? (He gets a one sentence summary in both the Angelic and Infernal Player’s Guides, and that’s it).