I was just reading about sigils to see if I used the word correctly. This is a deep rabbit hole. I think it's the right word. Apparently magicians have been drawing and using sigils since Solomon, at least. They either represent demons or the self. I think mine represents me.

Demons are another rabbit hole - they usually represent psychological forces that cause us to do things - they can be a helper, if the need is addressed, but are mostly destructive until addressed because they make you behave in ways that are over-compensatory.