Cat's Eye Marble
A stocky semianthro Meowstic girl in a hoodie, a mid-calf skirt, and a tank top that says "neko" in katakana.  She bares her teeth and flips you what's clearly supposed to be the middle finger gesture, although it's actually the second finger of four.

Mars the Meowstic, for marsflippy.  Description from Art Fight:

Hard to give the middle finger when you got four fingers huh

HEY i found Mars randomly searching for Meowstic, bookmarked her, and then forgot until the last minute.  She fucking rules

You may notice this is a little different from the version posted on Art Fight — I did in fact draw this on the last morning of the event, and I ended up sprucing it up a bit more afterwards.