Got a few more button styles here besides just the OoT medallions~
Top left: This is styled to resemble Zelda's apron from The Legend of Zelda: Skyward Sword, and says "Knights Academy" in english text, using the Hylian Language Project version of the Ancient Hylian Alphabet.
Top right: A yellow-gold Triforce on an orange-gold background.
Bottom left: The text "adventurer" in green and brown made to resemble Minecraft grass blocks, on a "stone" grey background.
Bottom right: This isn't really a companion "cube", it's a companion button! It will love you just as much as you love it, but be careful not to listen to anything it says.
You can get all of these over on etsy:
Knights Academy: [link]
Companion Button: [link]