The Monster Inside

So I like Leroux's phantom style and decided I needed A LOT of practice drawing in paint too sai, so this was made entirely in pts (aside from the text). I think that's the first time I've ever legitimately tried drawing in sai and posting it, so yeah, it's exciting. It was really, really good practice for me, I think.
Please give me as much feedback as you can, if able. I'm very much a beginner in digital art and would love any pointer/tips that I can get.