We use the phrase “wear your heart on your sleeve” in a casual way to say that we are showing our intimate emotions in an honest and open manner. … Knights would often wear a lady’s token around their sleeve of armor.
Does your character have a token they wear that either secret to them only, or which they are are willing to talk about, tells the world something about what they feel, need, or believe?
Is it perhaps a magic object that grants them the powers of the organ, like a heart on a sleeve, to pump blood to friends in need… or do one less a favor and just bleed?
Does one have rings on their hand like eyes that make them reminded to look and thus help them better see?
The Monarch Writers 