I agree with unicorns being innocent and pure of heart--very much tied in with magic and the spiritual. However, given they are still equine in nature, they are free spirited and will never be tamed. I had a mermaid for a while, so I am sure unicorns can be animal guides too.
Mine is the mountain lion. Here is the site about it.
I always did have a fondness for the big cats!
https://www.whats-your-sign.com/symb...a-meaning.html