These are mostly really great! I might just have to make Thevenin into the lighning one, it's probably my favorite here.
The fairy I really like, but I don't like that it doesn't have any of the white that most if not all of the other fairy pets have, gives it a bit more contrast. Aaand someone else mentioned that the wings are at odd angles, and while I didn't notice at first, I do agree with that. Everything else about it is great though!
And the gothic...the arms seem pretty off anatomically...I'm not really sure what's going on with the right (its left) arm...and it took me way too long to realize the striped something by its other arm is the scarf. That said, I absolutely love its face and expression...seriously perfect...the other stuff just kind of ruins it for me.