It was more than the simple fabrication of what brothers were, and they definitely were not ignorant of their blood, their relation, and their heritage.
Arthur and Alistair also knew of their past and of those scarring mistakes and awful fights against one another.
What held the two of them together were their shared and powerful attraction to each other that wasn't just skin deep.
Every scar and shared mark held them together like a tapestry: unique, sometimes flawed, but always beautiful in its unique pattern.
They became a necessary extension of one another, of flesh and bone.
Arthur was a part of Alistair that he could not let go of, and Alistair was a part of Arthur that no complaints could alter or take away.
Soulmates did not always appear before others as something that made sense yet they always matched one another in a way that was impossible to ignore or overlook, a way that inspired others often even ones that didn't know anything about them other than what they saw of them.
Soulmate was a word that like lover, boyfriend, and other words of such signifigance described them in a more befitting way than brothers which had never fit them well as they had often either behaved in ways that implied that the other was not close enough to be seen as an actual brother and not just an ocassional acquitance or in ways that seemed of a more romantic sort.
Scotland could hold England now as if the world's rules didn't matter and as if the two soulmates only would have each other for the rest of their lives.
Alistair and Arthur or perhaps Arthur and Alistair were made to be such an awe inspiring match, and nothing could tear that apart: be it an argument, a war, or other people.
Arthur let himself smil and that wall came down, "I love you."
"I love you too." Alistair smiled in return as day faded to night and time felt meaningless again.