Okay, wow you are really good. Looking at your most recent one 'We all fall down', it's superbly detailed, the foreshadowing is just something and lord the red one's hair. This is just fantastic.
One thing I'd have to say is that I'm not a big fan on the colouring. I'm guessing though it's just because they material you had on hand was limited though, in which case it was done really well if that's the case as it leaves an idea what you can do if you had available resources. But without getting into that, I hate the red one's ears, like I hate ears and crud with them, but here I know that the ear on the red one could've been placed much better, it should be leveled to her eye to her nose just like the blue haired one. Her eye shape should be more round shape, it's hard to explain, but the left curve of her right eye should be the opposite way round, hopefully you get what I mean. One suggestion also should be some shine, like leaving a little diamond on the eyes and blank strands on the hair to make it more 3D (It looks pretty 3D, but come on, no harm trying to make it more 3D)
But overall, fantastic job.