Claim! Some ideas here:
Telescope with something of a sci-fi vibe (either a uniform or something more casual will do)
Bellsnow but instead of warm clothing, wearing something lighter/more suitable for summer (because opposite day¿)
Queva but with a more fantasy-like clothing. Since she's a dark mage/witch, you can guide on that.
If none of these tickle your fancy anyone else will do just fine!
EDIT: Done! I was originally going to do a kappa-themed shirt (as in, cup of tea >> Kappa tee) but then I changed it to a hoodie of the same theme ;w; hope you like it!