The modified sheet of Ghost Angel (still spanish), that Carlos missed few details. Also, there were a Q&A about the sheet, so going to post a quick resume:
-The Angel originally had Nemesis, but since at the end Carlos decided to change it to an spiritual being, and a body is requiered to use Nemesis, it was ultimately removed from the original idea (although, it may have it).
-Is not a woman nor a man, although the idea of the adventure it that it makes the players believe it were Delacroix's wife.
-The Angel do not have the book, but is "physically" close to it, a few rooms from distance; it also possesses a piece of Black Metal, but not within the body.
-People with Blood of the Deads would feel nausea if the Angel is close.
-Summoning abilities doesn't work on it cuz: a) with physical form its an construct (naturally), and b) in its incorporeal form doens't exist.
-Can attack with the blades and defend with the spectral attacks with no issue.
-Can only use Divine Necromantic magic (if absorbs the 1000000 of souls), not even with grimories, but has access to free access spells.
-It has had four incarnations (being the Dumah the 4th one): Carlos didn't want to talk about the first one, 2nd one was destroyed by Unapistim, and the 3rd one was destroyed by Jūrgand's agents. 3rd one also used Nemesis and has relationships with Millenium.
-Its mundus operandi vary depending of the body, right now is pretty cautious.
-Can't trun much more powerful even with another body, at much it only increases one level and double the amount of souls per asault.
-Anyone capable to see spirits or with certain level of supernatural powers can notice when the Angel is absorbing souls, but overall pretty percibible.
-The incorporeal "form" of the Angel seem slike
this (NOTE: not official picture).
-Angel's wings can only be destroyed while using Cocoon, otherwis ethey are indestructible.