Okay, I absolutely love this. As someone who is non-binary I am in love with the representation. It was an amazing story but extremely sad. Also, I love the word Serendipity. You area great writer, keep it up.

You make a good point about people's prejudices against outsiders and anyone who looks different. Let me offer a little constructive criticism.

Hiding from the sun under a large oak reads better than hiding under a large oak from the sun.

If Moss is a plant based life form he should ooze sap not blood as he dies. Perhaps blood is more dramatic but sap is more consistent. Plants drained of sap die just as people drained of blood do.