I liked the duality of right hand with witchstain and left eye with magic, Xar having to hide his under a glove and Wish hiding hers behind her eyepatch
Plus two quotes from other media I thought fit them. They both deserve to yell at their parents
Xar, boy of destiny and Squeezjoos the sprite infected with witchblood.
All of these will go up on redbubble, which I linked to each post. These are the transparent stickers put on clear plastic and cut out, but you could also stick them on heavy paper as bookmarks, or get an entirely different item.