mediumwhat am-i

Tool of thief, toy of queen. Always used to be unseen. Sign of joy, sign of sorrow. Giving all likeness borrowed.
Common Wrong Answers
“A crown”
While a crown can be associated with royalty (the queen), it does not fit the descriptions of being unseen or a tool of a thief.
“A mirror”
A mirror reflects likeness but does not serve as a tool for a thief, nor is it typically associated with the themes of joy or sorrow in the same way a mask is.
“A costume”
Although a costume can be related to play and disguise, it does not specifically fulfill the criteria of being always unseen or directly linked to a thief.