As I can summarize:

In the Infirmary there are Mar, Athalus, Lyn, Locas, and a few other healers/soldiers fending off demons. The main threat to the PC's is the Amorphous Demon, who is highly resistant to the point of immune to physical attacks, but extremely weak to elemental attacks.

In the dinning hall there are a large amount of demons that Tyrael and Satori are trying to deal with, but there is also Zaad, who is under the effects of a rage poison. There is also a large demon leading a small band of Vexing Demons who is attacking Leith, and a Abomination Demon who's going to swing at Alaria. The large demon is pretty much just a giant smashy mook, but he's very strong and has decent magical resistance as well as a mind for tactics. The Vexing Demons are strong too, but otherwise have the endurance and intelligence of imps. They're a threat in their high numbers. The Abomination Demon is also just a smash mook but with higher physical defense and can ignore pain.

Outside Ssarak and Meirin are being swarmed by Moth Demons. In the gardens Coco should be attacked by a Mutant Demon, and in the court yard there's a Masked Demon. Moth demons are weak but fast and can do some nasty damage with their stingers, and the boss is able to communicate with them and spit acid. But each moth alone are fairly dumb and don't know how to coordinate either each other to be effective without a boss to order them around, not to mention that they don't have any wards. The mutant demon is also fast and hits hard, but has a mortal body. She could be killed pretty easily. Masked demon is another big smash demon, but thanks to having multiple faces, it can see all around itself. Sneaking attacking him is impossible.