Well! Never thought I'd see something like this. But having seen Billiam's review of Digimon Tamers, this picture resonates even more. :p In all seriousness, cute work! The soft-gray sketch lines and simple style are real cute.

Wait a sec
This isn't Braixen

I THOUGHT YOU SAID BEST FURRY WAIFU! :U

...K I'll stop. :B You asked for critique. I might not be the best artist in the world, but I have a goal! But that still doesn't leave me in a position to do a proper critique. :B Though I can guess by the tags you are going for the "simple and clean" look; for which it looks like you've got a good start.