Definitely bonded mates, they are so expressive with each other and prefer to sleep cuddled together. They are not distant and reserved with a playmate or friend like this. Even if it is another species. Once they give their love, they give their trust. Please never violate that! It is the highest gift a cat can bestow.
For the ancient Celts, the white hart was a harbinger of doom, a living symbol that some taboo has been transgressed or a moral law broken. The white hart's reputation improved in Arthurian legends, where its appearance was a sign to Arthur and his knights that it was time to embark on a quest - it was considered the one animal that could never be caught so it came to symbolise humanity's never-ending pursuit of knowledge and the unattainable.