In modern days, as the emissary to Hell, she regularly went to Hell to visit her formerly fellow Angel Sammael to play a board game that represented on a chess-like table the struggle between Hell and Heaven's forces, for over three decades.
The game was once disturbed by a nearly unbrained demon who grabbed a few pieces, causing various effects including the transformation of Jason Maldonado into Soulfire. Sammael restored the board after that tampering, adding new pieces to replace those now unusable, and Armaziel came to play another round. There, she played the "birthright of the prodigal incarnate" and, as the "penultimate movements [were] completed" retreated to Heaven.
When Hellstorm brought the souls of Joseph Gerhardt and Lisa to Heaven, they were admitted, but Hellstorm was refused entrance by Armaziel. When Hellstorm forced his way in to get a look at Heaven, Armaziel blasted him out and back to Hell.
Powers and Abilities
She presumably possesses all powers common among Angels.