I'm surprised with how this section is more monstrous than the first game that the author hasn't done a bird monster girl yet. The harpy spawn is from the first game so it doesn't count. Kind of a lot of unique poses they could do. Bonus points if its a phoenix, as they seem to be using demons that 'existed in folklore' in ths game for the most part and that'd be one that'd fit the bill.
Any other creatures the author should use that they haven't yet? They've done bugs, snakes, spiders, cats, plants, frogs, fish/merfolk, whatever Chrybdis is, .. what are they missing for a big general thing?